Finding the Third Proportional to 42,646.50 and 66,900.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,646.50 : 66,900.38 = 66,900.38 : x
2. Step 2: Convert to fraction form
   42,646.50/66,900.38 = 66,900.38/x
3. Step 3: Cross multiply
   42,646.50x = 66,900.38 × 66,900.38
4. Step 4: Simplify right side
   42,646.50x = 4,475,660,175.14
5. Step 5: Solve for x
   x = 4,475,660,175.14/42,646.50
6. Step 6: Final answer
   x = 104,947.89