Finding the Fourth Proportional to 99.72, 149.58 and 59.18

Step by Step Solution

1. Step 1: Write the proportion equation
   99.72 : 149.58 = 59.18 : x
2. Step 2: Convert to fraction form
   99.72/149.58 = 59.18/x
3. Step 3: Cross multiply
   99.72x = 149.58 × 59.18
4. Step 4: Simplify right side
   99.72x = 8,851.40
5. Step 5: Solve for x
   x = 8,851.40/99.72
6. Step 6: Final answer
   x = 88.76