Finding the Fourth Proportional to 99.06, 136.71 and 64.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99.06 : 136.71 = 64.10 : x
2. Step 2: Convert to fraction form
   99.06/136.71 = 64.10/x
3. Step 3: Cross multiply
   99.06x = 136.71 × 64.10
4. Step 4: Simplify right side
   99.06x = 8,762.27
5. Step 5: Solve for x
   x = 8,762.27/99.06
6. Step 6: Final answer
   x = 88.45