Finding the Third Proportional to 43,155.50 and 66,242.50

Step by Step Solution

1. Step 1: Write the proportion equation
   43,155.50 : 66,242.50 = 66,242.50 : x
2. Step 2: Convert to fraction form
   43,155.50/66,242.50 = 66,242.50/x
3. Step 3: Cross multiply
   43,155.50x = 66,242.50 × 66,242.50
4. Step 4: Simplify right side
   43,155.50x = 4,388,068,806.25
5. Step 5: Solve for x
   x = 4,388,068,806.25/43,155.50
6. Step 6: Final answer
   x = 101,680.41