Finding the Fourth Proportional to 82.87, 124.34 and 42.32

Step by Step Solution

1. Step 1: Write the proportion equation
   82.87 : 124.34 = 42.32 : x
2. Step 2: Convert to fraction form
   82.87/124.34 = 42.32/x
3. Step 3: Cross multiply
   82.87x = 124.34 × 42.32
4. Step 4: Simplify right side
   82.87x = 5,262.17
5. Step 5: Solve for x
   x = 5,262.17/82.87
6. Step 6: Final answer
   x = 63.50