Finding the Fourth Proportional to 585,298.50, 807,711.96 and 317,026.50

Step by Step Solution

1. Step 1: Write the proportion equation
   585,298.50 : 807,711.96 = 317,026.50 : x
2. Step 2: Convert to fraction form
   585,298.50/807,711.96 = 317,026.50/x
3. Step 3: Cross multiply
   585,298.50x = 807,711.96 × 317,026.50
4. Step 4: Simplify right side
   585,298.50x = 256,066,095,686.94
5. Step 5: Solve for x
   x = 256,066,095,686.94/585,298.50
6. Step 6: Final answer
   x = 437,496.59