Finding the Fourth Proportional to 99.05, 136.71 and 57.62

Step by Step Solution

1. Step 1: Write the proportion equation
   99.05 : 136.71 = 57.62 : x
2. Step 2: Convert to fraction form
   99.05/136.71 = 57.62/x
3. Step 3: Cross multiply
   99.05x = 136.71 × 57.62
4. Step 4: Simplify right side
   99.05x = 7,876.55
5. Step 5: Solve for x
   x = 7,876.55/99.05
6. Step 6: Final answer
   x = 79.52