Finding the Fourth Proportional to 31,148.64, 42,986.88 and 29,049.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,148.64 : 42,986.88 = 29,049.12 : x
2. Step 2: Convert to fraction form
   31,148.64/42,986.88 = 29,049.12/x
3. Step 3: Cross multiply
   31,148.64x = 42,986.88 × 29,049.12
4. Step 4: Simplify right side
   31,148.64x = 1,248,731,035.55
5. Step 5: Solve for x
   x = 1,248,731,035.55/31,148.64
6. Step 6: Final answer
   x = 40,089.42