Finding the Third Proportional to 42,939 and 63,123

Step by Step Solution

1. Step 1: Write the proportion equation
   42,939 : 63,123 = 63,123 : x
2. Step 2: Convert to fraction form
   42,939/63,123 = 63,123/x
3. Step 3: Cross multiply
   42,939x = 63,123 × 63,123
4. Step 4: Simplify right side
   42,939x = 3,984,513,129
5. Step 5: Solve for x
   x = 3,984,513,129/42,939
6. Step 6: Final answer
   x = 92,794.74