Finding the Fourth Proportional to 99.37, 137.05 and 62.55

Step by Step Solution

1. Step 1: Write the proportion equation
   99.37 : 137.05 = 62.55 : x
2. Step 2: Convert to fraction form
   99.37/137.05 = 62.55/x
3. Step 3: Cross multiply
   99.37x = 137.05 × 62.55
4. Step 4: Simplify right side
   99.37x = 8,572.32
5. Step 5: Solve for x
   x = 8,572.32/99.37
6. Step 6: Final answer
   x = 86.27