Finding the Third Proportional to 53,179.88 and 81,158.63

Step by Step Solution

1. Step 1: Write the proportion equation
   53,179.88 : 81,158.63 = 81,158.63 : x
2. Step 2: Convert to fraction form
   53,179.88/81,158.63 = 81,158.63/x
3. Step 3: Cross multiply
   53,179.88x = 81,158.63 × 81,158.63
4. Step 4: Simplify right side
   53,179.88x = 6,586,722,411.89
5. Step 5: Solve for x
   x = 6,586,722,411.89/53,179.88
6. Step 6: Final answer
   x = 123,857.43