Finding the Fourth Proportional to 31,132.68, 42,962.94 and 16,986.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,132.68 : 42,962.94 = 16,986.12 : x
2. Step 2: Convert to fraction form
   31,132.68/42,962.94 = 16,986.12/x
3. Step 3: Cross multiply
   31,132.68x = 42,962.94 × 16,986.12
4. Step 4: Simplify right side
   31,132.68x = 729,773,654.39
5. Step 5: Solve for x
   x = 729,773,654.39/31,132.68
6. Step 6: Final answer
   x = 23,440.76