Finding the Third Proportional to 42,322.50 and 66,966.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,322.50 : 66,966.75 = 66,966.75 : x
2. Step 2: Convert to fraction form
   42,322.50/66,966.75 = 66,966.75/x
3. Step 3: Cross multiply
   42,322.50x = 66,966.75 × 66,966.75
4. Step 4: Simplify right side
   42,322.50x = 4,484,545,605.56
5. Step 5: Solve for x
   x = 4,484,545,605.56/42,322.50
6. Step 6: Final answer
   x = 105,961.26