Finding the Third Proportional to 89,763.75 and 139,385.63

Step by Step Solution

1. Step 1: Write the proportion equation
   89,763.75 : 139,385.63 = 139,385.63 : x
2. Step 2: Convert to fraction form
   89,763.75/139,385.63 = 139,385.63/x
3. Step 3: Cross multiply
   89,763.75x = 139,385.63 × 139,385.63
4. Step 4: Simplify right side
   89,763.75x = 19,428,352,456.64
5. Step 5: Solve for x
   x = 19,428,352,456.64/89,763.75
6. Step 6: Final answer
   x = 216,438.73