Finding the Third Proportional to 60,840 and 90,372

Step by Step Solution

1. Step 1: Write the proportion equation
   60,840 : 90,372 = 90,372 : x
2. Step 2: Convert to fraction form
   60,840/90,372 = 90,372/x
3. Step 3: Cross multiply
   60,840x = 90,372 × 90,372
4. Step 4: Simplify right side
   60,840x = 8,167,098,384
5. Step 5: Solve for x
   x = 8,167,098,384/60,840
6. Step 6: Final answer
   x = 134,238.96