Finding the Third Proportional to 42,993.50 and 66,434.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,993.50 : 66,434.50 = 66,434.50 : x
2. Step 2: Convert to fraction form
   42,993.50/66,434.50 = 66,434.50/x
3. Step 3: Cross multiply
   42,993.50x = 66,434.50 × 66,434.50
4. Step 4: Simplify right side
   42,993.50x = 4,413,542,790.25
5. Step 5: Solve for x
   x = 4,413,542,790.25/42,993.50
6. Step 6: Final answer
   x = 102,656.05