Finding the Third Proportional to 66,463.50 and 89,543.25

Step by Step Solution

1. Step 1: Write the proportion equation
   66,463.50 : 89,543.25 = 89,543.25 : x
2. Step 2: Convert to fraction form
   66,463.50/89,543.25 = 89,543.25/x
3. Step 3: Cross multiply
   66,463.50x = 89,543.25 × 89,543.25
4. Step 4: Simplify right side
   66,463.50x = 8,017,993,620.56
5. Step 5: Solve for x
   x = 8,017,993,620.56/66,463.50
6. Step 6: Final answer
   x = 120,637.55