Finding the Third Proportional to 31,160 and 63,280

Step by Step Solution

1. Step 1: Write the proportion equation
   31,160 : 63,280 = 63,280 : x
2. Step 2: Convert to fraction form
   31,160/63,280 = 63,280/x
3. Step 3: Cross multiply
   31,160x = 63,280 × 63,280
4. Step 4: Simplify right side
   31,160x = 4,004,358,400
5. Step 5: Solve for x
   x = 4,004,358,400/31,160
6. Step 6: Final answer
   x = 128,509.58