Finding the Fourth Proportional to 1,356,931.31, 2,035,085.99 and 809,978.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356,931.31 : 2,035,085.99 = 809,978.13 : x
2. Step 2: Convert to fraction form
   1,356,931.31/2,035,085.99 = 809,978.13/x
3. Step 3: Cross multiply
   1,356,931.31x = 2,035,085.99 × 809,978.13
4. Step 4: Simplify right side
   1,356,931.31x = 1,648,375,140,519.51
5. Step 5: Solve for x
   x = 1,648,375,140,519.51/1,356,931.31
6. Step 6: Final answer
   x = 1,214,781.57