Finding the Fourth Proportional to 2,181,353.89, 3,272,385.57 and 644,505.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181,353.89 : 3,272,385.57 = 644,505.25 : x
2. Step 2: Convert to fraction form
   2,181,353.89/3,272,385.57 = 644,505.25/x
3. Step 3: Cross multiply
   2,181,353.89x = 3,272,385.57 × 644,505.25
4. Step 4: Simplify right side
   2,181,353.89x = 2,109,069,676,666.72
5. Step 5: Solve for x
   x = 2,109,069,676,666.72/2,181,353.89
6. Step 6: Final answer
   x = 966,862.68