Finding the Third Proportional to 12,661.31 and 29,311.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.31 : 29,311.88 = 29,311.88 : x
2. Step 2: Convert to fraction form
   12,661.31/29,311.88 = 29,311.88/x
3. Step 3: Cross multiply
   12,661.31x = 29,311.88 × 29,311.88
4. Step 4: Simplify right side
   12,661.31x = 859,186,016.02
5. Step 5: Solve for x
   x = 859,186,016.02/12,661.31
6. Step 6: Final answer
   x = 67,859.16