Finding the Fourth Proportional to 97.61, 145.71 and 89.10

Step by Step Solution

1. Step 1: Write the proportion equation
   97.61 : 145.71 = 89.10 : x
2. Step 2: Convert to fraction form
   97.61/145.71 = 89.10/x
3. Step 3: Cross multiply
   97.61x = 145.71 × 89.10
4. Step 4: Simplify right side
   97.61x = 12,982.76
5. Step 5: Solve for x
   x = 12,982.76/97.61
6. Step 6: Final answer
   x = 133.01