Finding the Fourth Proportional to 901,978.12, 1,244,257.90 and 557,704

Step by Step Solution

1. Step 1: Write the proportion equation
   901,978.12 : 1,244,257.90 = 557,704 : x
2. Step 2: Convert to fraction form
   901,978.12/1,244,257.90 = 557,704/x
3. Step 3: Cross multiply
   901,978.12x = 1,244,257.90 × 557,704
4. Step 4: Simplify right side
   901,978.12x = 693,927,607,861.60
5. Step 5: Solve for x
   x = 693,927,607,861.60/901,978.12
6. Step 6: Final answer
   x = 769,339.74