Finding the Third Proportional to 42,593.50 and 66,820.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,593.50 : 66,820.75 = 66,820.75 : x
2. Step 2: Convert to fraction form
   42,593.50/66,820.75 = 66,820.75/x
3. Step 3: Cross multiply
   42,593.50x = 66,820.75 × 66,820.75
4. Step 4: Simplify right side
   42,593.50x = 4,465,012,630.56
5. Step 5: Solve for x
   x = 4,465,012,630.56/42,593.50
6. Step 6: Final answer
   x = 104,828.50