Finding the Third Proportional to 31,713.61 and 69,704.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,713.61 : 69,704.72 = 69,704.72 : x
2. Step 2: Convert to fraction form
   31,713.61/69,704.72 = 69,704.72/x
3. Step 3: Cross multiply
   31,713.61x = 69,704.72 × 69,704.72
4. Step 4: Simplify right side
   31,713.61x = 4,858,747,816.02
5. Step 5: Solve for x
   x = 4,858,747,816.02/31,713.61
6. Step 6: Final answer
   x = 153,207.03