Finding the Fourth Proportional to 99,921.31, 150,072.72 and 57,885.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99,921.31 : 150,072.72 = 57,885.82 : x
2. Step 2: Convert to fraction form
   99,921.31/150,072.72 = 57,885.82/x
3. Step 3: Cross multiply
   99,921.31x = 150,072.72 × 57,885.82
4. Step 4: Simplify right side
   99,921.31x = 8,687,082,456.83
5. Step 5: Solve for x
   x = 8,687,082,456.83/99,921.31
6. Step 6: Final answer
   x = 86,939.24