Finding the Third Proportional to 31,688.72 and 64,254.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,688.72 : 64,254.52 = 64,254.52 : x
2. Step 2: Convert to fraction form
   31,688.72/64,254.52 = 64,254.52/x
3. Step 3: Cross multiply
   31,688.72x = 64,254.52 × 64,254.52
4. Step 4: Simplify right side
   31,688.72x = 4,128,642,778.20
5. Step 5: Solve for x
   x = 4,128,642,778.20/31,688.72
6. Step 6: Final answer
   x = 130,287.46