Finding the Third Proportional to 31,518 and 67,248

Step by Step Solution

1. Step 1: Write the proportion equation
   31,518 : 67,248 = 67,248 : x
2. Step 2: Convert to fraction form
   31,518/67,248 = 67,248/x
3. Step 3: Cross multiply
   31,518x = 67,248 × 67,248
4. Step 4: Simplify right side
   31,518x = 4,522,293,504
5. Step 5: Solve for x
   x = 4,522,293,504/31,518
6. Step 6: Final answer
   x = 143,482.88