Finding the Fourth Proportional to 82.99, 124.40 and 42.32

Step by Step Solution

1. Step 1: Write the proportion equation
   82.99 : 124.40 = 42.32 : x
2. Step 2: Convert to fraction form
   82.99/124.40 = 42.32/x
3. Step 3: Cross multiply
   82.99x = 124.40 × 42.32
4. Step 4: Simplify right side
   82.99x = 5,263.77
5. Step 5: Solve for x
   x = 5,263.77/82.99
6. Step 6: Final answer
   x = 63.43