Finding the Third Proportional to 40,687.31 and 83,561.63

Step by Step Solution

1. Step 1: Write the proportion equation
   40,687.31 : 83,561.63 = 83,561.63 : x
2. Step 2: Convert to fraction form
   40,687.31/83,561.63 = 83,561.63/x
3. Step 3: Cross multiply
   40,687.31x = 83,561.63 × 83,561.63
4. Step 4: Simplify right side
   40,687.31x = 6,982,545,172.64
5. Step 5: Solve for x
   x = 6,982,545,172.64/40,687.31
6. Step 6: Final answer
   x = 171,614.80