Finding the Third Proportional to 31,681.13 and 65,503.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,681.13 : 65,503.69 = 65,503.69 : x
2. Step 2: Convert to fraction form
   31,681.13/65,503.69 = 65,503.69/x
3. Step 3: Cross multiply
   31,681.13x = 65,503.69 × 65,503.69
4. Step 4: Simplify right side
   31,681.13x = 4,290,733,076.10
5. Step 5: Solve for x
   x = 4,290,733,076.10/31,681.13
6. Step 6: Final answer
   x = 135,435.00