Finding the Fourth Proportional to 99,887.05, 137,848.31 and 57,445.61

Step by Step Solution

1. Step 1: Write the proportion equation
   99,887.05 : 137,848.31 = 57,445.61 : x
2. Step 2: Convert to fraction form
   99,887.05/137,848.31 = 57,445.61/x
3. Step 3: Cross multiply
   99,887.05x = 137,848.31 × 57,445.61
4. Step 4: Simplify right side
   99,887.05x = 7,918,780,399.03
5. Step 5: Solve for x
   x = 7,918,780,399.03/99,887.05
6. Step 6: Final answer
   x = 79,277.35