Finding the Third Proportional to 31,248 and 63,360

Step by Step Solution

1. Step 1: Write the proportion equation
   31,248 : 63,360 = 63,360 : x
2. Step 2: Convert to fraction form
   31,248/63,360 = 63,360/x
3. Step 3: Cross multiply
   31,248x = 63,360 × 63,360
4. Step 4: Simplify right side
   31,248x = 4,014,489,600
5. Step 5: Solve for x
   x = 4,014,489,600/31,248
6. Step 6: Final answer
   x = 128,471.89