Finding the Fourth Proportional to 88.61, 132.86 and 42.86

Step by Step Solution

1. Step 1: Write the proportion equation
   88.61 : 132.86 = 42.86 : x
2. Step 2: Convert to fraction form
   88.61/132.86 = 42.86/x
3. Step 3: Cross multiply
   88.61x = 132.86 × 42.86
4. Step 4: Simplify right side
   88.61x = 5,694.82
5. Step 5: Solve for x
   x = 5,694.82/88.61
6. Step 6: Final answer
   x = 64.27