Finding the Fourth Proportional to 991,278, 1,368,080.28 and 588,870

Step by Step Solution

1. Step 1: Write the proportion equation
   991,278 : 1,368,080.28 = 588,870 : x
2. Step 2: Convert to fraction form
   991,278/1,368,080.28 = 588,870/x
3. Step 3: Cross multiply
   991,278x = 1,368,080.28 × 588,870
4. Step 4: Simplify right side
   991,278x = 805,621,434,483.60
5. Step 5: Solve for x
   x = 805,621,434,483.60/991,278
6. Step 6: Final answer
   x = 812,709.89