Finding the Third Proportional to 42,102 and 90,040

Step by Step Solution

1. Step 1: Write the proportion equation
   42,102 : 90,040 = 90,040 : x
2. Step 2: Convert to fraction form
   42,102/90,040 = 90,040/x
3. Step 3: Cross multiply
   42,102x = 90,040 × 90,040
4. Step 4: Simplify right side
   42,102x = 8,107,201,600
5. Step 5: Solve for x
   x = 8,107,201,600/42,102
6. Step 6: Final answer
   x = 192,560.96