Finding the Third Proportional to 31,508.81 and 65,938.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,508.81 : 65,938.69 = 65,938.69 : x
2. Step 2: Convert to fraction form
   31,508.81/65,938.69 = 65,938.69/x
3. Step 3: Cross multiply
   31,508.81x = 65,938.69 × 65,938.69
4. Step 4: Simplify right side
   31,508.81x = 4,347,910,509.22
5. Step 5: Solve for x
   x = 4,347,910,509.22/31,508.81
6. Step 6: Final answer
   x = 137,990.30