Finding the Third Proportional to 42,480 and 67,485.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,480 : 67,485.38 = 67,485.38 : x
2. Step 2: Convert to fraction form
   42,480/67,485.38 = 67,485.38/x
3. Step 3: Cross multiply
   42,480x = 67,485.38 × 67,485.38
4. Step 4: Simplify right side
   42,480x = 4,554,275,838.89
5. Step 5: Solve for x
   x = 4,554,275,838.89/42,480
6. Step 6: Final answer
   x = 107,209.88