Finding the Third Proportional to 89,929.88 and 131,978.63

Step by Step Solution

1. Step 1: Write the proportion equation
   89,929.88 : 131,978.63 = 131,978.63 : x
2. Step 2: Convert to fraction form
   89,929.88/131,978.63 = 131,978.63/x
3. Step 3: Cross multiply
   89,929.88x = 131,978.63 × 131,978.63
4. Step 4: Simplify right side
   89,929.88x = 17,418,357,456.89
5. Step 5: Solve for x
   x = 17,418,357,456.89/89,929.88
6. Step 6: Final answer
   x = 193,688.22