Finding the Fourth Proportional to 99,731.72, 137,630.16 and 54,410.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,731.72 : 137,630.16 = 54,410.72 : x
2. Step 2: Convert to fraction form
   99,731.72/137,630.16 = 54,410.72/x
3. Step 3: Cross multiply
   99,731.72x = 137,630.16 × 54,410.72
4. Step 4: Simplify right side
   99,731.72x = 7,488,556,099.32
5. Step 5: Solve for x
   x = 7,488,556,099.32/99,731.72
6. Step 6: Final answer
   x = 75,087.00