Finding the Third Proportional to 31,041.81 and 65,781.39

Step by Step Solution

1. Step 1: Write the proportion equation
   31,041.81 : 65,781.39 = 65,781.39 : x
2. Step 2: Convert to fraction form
   31,041.81/65,781.39 = 65,781.39/x
3. Step 3: Cross multiply
   31,041.81x = 65,781.39 × 65,781.39
4. Step 4: Simplify right side
   31,041.81x = 4,327,191,705.88
5. Step 5: Solve for x
   x = 4,327,191,705.88/31,041.81
6. Step 6: Final answer
   x = 139,398.81