Finding the Fourth Proportional to 617,105.76, 851,362.56 and 387,528

Step by Step Solution

1. Step 1: Write the proportion equation
   617,105.76 : 851,362.56 = 387,528 : x
2. Step 2: Convert to fraction form
   617,105.76/851,362.56 = 387,528/x
3. Step 3: Cross multiply
   617,105.76x = 851,362.56 × 387,528
4. Step 4: Simplify right side
   617,105.76x = 329,926,830,151.68
5. Step 5: Solve for x
   x = 329,926,830,151.68/617,105.76
6. Step 6: Final answer
   x = 534,635.80