Finding the Fourth Proportional to 87.99, 131.89 and 42.32

Step by Step Solution

1. Step 1: Write the proportion equation
   87.99 : 131.89 = 42.32 : x
2. Step 2: Convert to fraction form
   87.99/131.89 = 42.32/x
3. Step 3: Cross multiply
   87.99x = 131.89 × 42.32
4. Step 4: Simplify right side
   87.99x = 5,582.02
5. Step 5: Solve for x
   x = 5,582.02/87.99
6. Step 6: Final answer
   x = 63.44