Finding the Fourth Proportional to 585,300.50, 807,714.72 and 317,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   585,300.50 : 807,714.72 = 317,028.50 : x
2. Step 2: Convert to fraction form
   585,300.50/807,714.72 = 317,028.50/x
3. Step 3: Cross multiply
   585,300.50x = 807,714.72 × 317,028.50
4. Step 4: Simplify right side
   585,300.50x = 256,068,586,109.52
5. Step 5: Solve for x
   x = 256,068,586,109.52/585,300.50
6. Step 6: Final answer
   x = 437,499.35