Finding the Fourth Proportional to 89.32, 123.15 and 61.63

Step by Step Solution

1. Step 1: Write the proportion equation
   89.32 : 123.15 = 61.63 : x
2. Step 2: Convert to fraction form
   89.32/123.15 = 61.63/x
3. Step 3: Cross multiply
   89.32x = 123.15 × 61.63
4. Step 4: Simplify right side
   89.32x = 7,589.73
5. Step 5: Solve for x
   x = 7,589.73/89.32
6. Step 6: Final answer
   x = 84.97