Finding the Third Proportional to 56,859 and 85,290

Step by Step Solution

1. Step 1: Write the proportion equation
   56,859 : 85,290 = 85,290 : x
2. Step 2: Convert to fraction form
   56,859/85,290 = 85,290/x
3. Step 3: Cross multiply
   56,859x = 85,290 × 85,290
4. Step 4: Simplify right side
   56,859x = 7,274,384,100
5. Step 5: Solve for x
   x = 7,274,384,100/56,859
6. Step 6: Final answer
   x = 127,937.25