Finding the Third Proportional to 81,261 and 107,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,261 : 107,851.50 = 107,851.50 : x
2. Step 2: Convert to fraction form
   81,261/107,851.50 = 107,851.50/x
3. Step 3: Cross multiply
   81,261x = 107,851.50 × 107,851.50
4. Step 4: Simplify right side
   81,261x = 11,631,946,052.25
5. Step 5: Solve for x
   x = 11,631,946,052.25/81,261
6. Step 6: Final answer
   x = 143,143.03