Finding the Fourth Proportional to 578,892.72, 869,673.96 and 554,978.28

Step by Step Solution

1. Step 1: Write the proportion equation
   578,892.72 : 869,673.96 = 554,978.28 : x
2. Step 2: Convert to fraction form
   578,892.72/869,673.96 = 554,978.28/x
3. Step 3: Cross multiply
   578,892.72x = 869,673.96 × 554,978.28
4. Step 4: Simplify right side
   578,892.72x = 482,650,158,481.59
5. Step 5: Solve for x
   x = 482,650,158,481.59/578,892.72
6. Step 6: Final answer
   x = 833,747.16