Finding the Fourth Proportional to 99,449.98, 137,238.81 and 54,126.83

Step by Step Solution

1. Step 1: Write the proportion equation
   99,449.98 : 137,238.81 = 54,126.83 : x
2. Step 2: Convert to fraction form
   99,449.98/137,238.81 = 54,126.83/x
3. Step 3: Cross multiply
   99,449.98x = 137,238.81 × 54,126.83
4. Step 4: Simplify right side
   99,449.98x = 7,428,301,878.39
5. Step 5: Solve for x
   x = 7,428,301,878.39/99,449.98
6. Step 6: Final answer
   x = 74,693.85