Finding the Fourth Proportional to 1,007,298.18, 1,389,986.73 and 577,479.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007,298.18 : 1,389,986.73 = 577,479.78 : x
2. Step 2: Convert to fraction form
   1,007,298.18/1,389,986.73 = 577,479.78/x
3. Step 3: Cross multiply
   1,007,298.18x = 1,389,986.73 × 577,479.78
4. Step 4: Simplify right side
   1,007,298.18x = 802,689,231,043.32
5. Step 5: Solve for x
   x = 802,689,231,043.32/1,007,298.18
6. Step 6: Final answer
   x = 796,873.50