Finding the Third Proportional to 42,634.69 and 66,199.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,634.69 : 66,199.78 = 66,199.78 : x
2. Step 2: Convert to fraction form
   42,634.69/66,199.78 = 66,199.78/x
3. Step 3: Cross multiply
   42,634.69x = 66,199.78 × 66,199.78
4. Step 4: Simplify right side
   42,634.69x = 4,382,411,037.55
5. Step 5: Solve for x
   x = 4,382,411,037.55/42,634.69
6. Step 6: Final answer
   x = 102,789.80