Finding the Third Proportional to 56,680 and 88,170

Step by Step Solution

1. Step 1: Write the proportion equation
   56,680 : 88,170 = 88,170 : x
2. Step 2: Convert to fraction form
   56,680/88,170 = 88,170/x
3. Step 3: Cross multiply
   56,680x = 88,170 × 88,170
4. Step 4: Simplify right side
   56,680x = 7,773,948,900
5. Step 5: Solve for x
   x = 7,773,948,900/56,680
6. Step 6: Final answer
   x = 137,155.06