Finding the Third Proportional to 42,622.50 and 66,055.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,622.50 : 66,055.50 = 66,055.50 : x
2. Step 2: Convert to fraction form
   42,622.50/66,055.50 = 66,055.50/x
3. Step 3: Cross multiply
   42,622.50x = 66,055.50 × 66,055.50
4. Step 4: Simplify right side
   42,622.50x = 4,363,329,080.25
5. Step 5: Solve for x
   x = 4,363,329,080.25/42,622.50
6. Step 6: Final answer
   x = 102,371.50