Finding the Third Proportional to 31,559.63 and 68,434.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,559.63 : 68,434.88 = 68,434.88 : x
2. Step 2: Convert to fraction form
   31,559.63/68,434.88 = 68,434.88/x
3. Step 3: Cross multiply
   31,559.63x = 68,434.88 × 68,434.88
4. Step 4: Simplify right side
   31,559.63x = 4,683,332,116.27
5. Step 5: Solve for x
   x = 4,683,332,116.27/31,559.63
6. Step 6: Final answer
   x = 148,396.32