Finding the Fourth Proportional to 901,978.31, 1,244,258.16 and 557,704.19

Step by Step Solution

1. Step 1: Write the proportion equation
   901,978.31 : 1,244,258.16 = 557,704.19 : x
2. Step 2: Convert to fraction form
   901,978.31/1,244,258.16 = 557,704.19/x
3. Step 3: Cross multiply
   901,978.31x = 1,244,258.16 × 557,704.19
4. Step 4: Simplify right side
   901,978.31x = 693,927,989,273.69
5. Step 5: Solve for x
   x = 693,927,989,273.69/901,978.31
6. Step 6: Final answer
   x = 769,340.00