Finding the Fourth Proportional to 72,131.79, 99,524.80 and 41,899.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,131.79 : 99,524.80 = 41,899.15 : x
2. Step 2: Convert to fraction form
   72,131.79/99,524.80 = 41,899.15/x
3. Step 3: Cross multiply
   72,131.79x = 99,524.80 × 41,899.15
4. Step 4: Simplify right side
   72,131.79x = 4,170,004,523.92
5. Step 5: Solve for x
   x = 4,170,004,523.92/72,131.79
6. Step 6: Final answer
   x = 57,810.91