Finding the Fourth Proportional to 899,109.12, 1,349,327.32 and 425,793.72

Step by Step Solution

1. Step 1: Write the proportion equation
   899,109.12 : 1,349,327.32 = 425,793.72 : x
2. Step 2: Convert to fraction form
   899,109.12/1,349,327.32 = 425,793.72/x
3. Step 3: Cross multiply
   899,109.12x = 1,349,327.32 × 425,793.72
4. Step 4: Simplify right side
   899,109.12x = 574,535,099,080.43
5. Step 5: Solve for x
   x = 574,535,099,080.43/899,109.12
6. Step 6: Final answer
   x = 639,004.86