Finding the Third Proportional to 57,788 and 85,800

Step by Step Solution

1. Step 1: Write the proportion equation
   57,788 : 85,800 = 85,800 : x
2. Step 2: Convert to fraction form
   57,788/85,800 = 85,800/x
3. Step 3: Cross multiply
   57,788x = 85,800 × 85,800
4. Step 4: Simplify right side
   57,788x = 7,361,640,000
5. Step 5: Solve for x
   x = 7,361,640,000/57,788
6. Step 6: Final answer
   x = 127,390.46