Finding the Third Proportional to 113,810 and 172,280

Step by Step Solution

1. Step 1: Write the proportion equation
   113,810 : 172,280 = 172,280 : x
2. Step 2: Convert to fraction form
   113,810/172,280 = 172,280/x
3. Step 3: Cross multiply
   113,810x = 172,280 × 172,280
4. Step 4: Simplify right side
   113,810x = 29,680,398,400
5. Step 5: Solve for x
   x = 29,680,398,400/113,810
6. Step 6: Final answer
   x = 260,789.02