Finding the Fourth Proportional to 2,085,709,845.64, 2,878,526,338.61 and 1,238,940,513.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085,709,845.64 : 2,878,526,338.61 = 1,238,940,513.56 : x
2. Step 2: Convert to fraction form
   2,085,709,845.64/2,878,526,338.61 = 1,238,940,513.56/x
3. Step 3: Cross multiply
   2,085,709,845.64x = 2,878,526,338.61 × 1,238,940,513.56
4. Step 4: Simplify right side
   2,085,709,845.64x = 3,566,322,900,253,459,968
5. Step 5: Solve for x
   x = 3,566,322,900,253,459,968/2,085,709,845.64
6. Step 6: Final answer
   x = 1,709,884,482.59