Finding the Fourth Proportional to 72,150.41, 99,567.90 and 39,445.49

Step by Step Solution

1. Step 1: Write the proportion equation
   72,150.41 : 99,567.90 = 39,445.49 : x
2. Step 2: Convert to fraction form
   72,150.41/99,567.90 = 39,445.49/x
3. Step 3: Cross multiply
   72,150.41x = 99,567.90 × 39,445.49
4. Step 4: Simplify right side
   72,150.41x = 3,927,504,852.69
5. Step 5: Solve for x
   x = 3,927,504,852.69/72,150.41
6. Step 6: Final answer
   x = 54,434.96