Finding the Third Proportional to 71,290 and 112,128

Step by Step Solution

1. Step 1: Write the proportion equation
   71,290 : 112,128 = 112,128 : x
2. Step 2: Convert to fraction form
   71,290/112,128 = 112,128/x
3. Step 3: Cross multiply
   71,290x = 112,128 × 112,128
4. Step 4: Simplify right side
   71,290x = 12,572,688,384
5. Step 5: Solve for x
   x = 12,572,688,384/71,290
6. Step 6: Final answer
   x = 176,359.78