Finding the Fourth Proportional to 72,142.16, 99,534.24 and 41,921.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,142.16 : 99,534.24 = 41,921.60 : x
2. Step 2: Convert to fraction form
   72,142.16/99,534.24 = 41,921.60/x
3. Step 3: Cross multiply
   72,142.16x = 99,534.24 × 41,921.60
4. Step 4: Simplify right side
   72,142.16x = 4,172,634,595.58
5. Step 5: Solve for x
   x = 4,172,634,595.58/72,142.16
6. Step 6: Final answer
   x = 57,839.06