Finding the Third Proportional to 42,628.78 and 63,679.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,628.78 : 63,679.78 = 63,679.78 : x
2. Step 2: Convert to fraction form
   42,628.78/63,679.78 = 63,679.78/x
3. Step 3: Cross multiply
   42,628.78x = 63,679.78 × 63,679.78
4. Step 4: Simplify right side
   42,628.78x = 4,055,114,540.05
5. Step 5: Solve for x
   x = 4,055,114,540.05/42,628.78
6. Step 6: Final answer
   x = 95,126.21