Finding the Third Proportional to 42,593.50 and 66,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,593.50 : 66,820.50 = 66,820.50 : x
2. Step 2: Convert to fraction form
   42,593.50/66,820.50 = 66,820.50/x
3. Step 3: Cross multiply
   42,593.50x = 66,820.50 × 66,820.50
4. Step 4: Simplify right side
   42,593.50x = 4,464,979,220.25
5. Step 5: Solve for x
   x = 4,464,979,220.25/42,593.50
6. Step 6: Final answer
   x = 104,827.71