Finding the Fourth Proportional to 99,431.62, 137,216.22 and 54,109.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,431.62 : 137,216.22 = 54,109.96 : x
2. Step 2: Convert to fraction form
   99,431.62/137,216.22 = 54,109.96/x
3. Step 3: Cross multiply
   99,431.62x = 137,216.22 × 54,109.96
4. Step 4: Simplify right side
   99,431.62x = 7,424,764,175.55
5. Step 5: Solve for x
   x = 7,424,764,175.55/99,431.62
6. Step 6: Final answer
   x = 74,672.06