Finding the Third Proportional to 42,807 and 66,549

Step by Step Solution

1. Step 1: Write the proportion equation
   42,807 : 66,549 = 66,549 : x
2. Step 2: Convert to fraction form
   42,807/66,549 = 66,549/x
3. Step 3: Cross multiply
   42,807x = 66,549 × 66,549
4. Step 4: Simplify right side
   42,807x = 4,428,769,401
5. Step 5: Solve for x
   x = 4,428,769,401/42,807
6. Step 6: Final answer
   x = 103,459.00