Finding the Fourth Proportional to 99.02, 136.61 and 62.18

Step by Step Solution

1. Step 1: Write the proportion equation
   99.02 : 136.61 = 62.18 : x
2. Step 2: Convert to fraction form
   99.02/136.61 = 62.18/x
3. Step 3: Cross multiply
   99.02x = 136.61 × 62.18
4. Step 4: Simplify right side
   99.02x = 8,494.10
5. Step 5: Solve for x
   x = 8,494.10/99.02
6. Step 6: Final answer
   x = 85.78