Finding the Third Proportional to 91,705.92 and 138,851.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,705.92 : 138,851.72 = 138,851.72 : x
2. Step 2: Convert to fraction form
   91,705.92/138,851.72 = 138,851.72/x
3. Step 3: Cross multiply
   91,705.92x = 138,851.72 × 138,851.72
4. Step 4: Simplify right side
   91,705.92x = 19,279,799,799.83
5. Step 5: Solve for x
   x = 19,279,799,799.83/91,705.92
6. Step 6: Final answer
   x = 210,235.06