Finding the Third Proportional to 57,400 and 86,158

Step by Step Solution

1. Step 1: Write the proportion equation
   57,400 : 86,158 = 86,158 : x
2. Step 2: Convert to fraction form
   57,400/86,158 = 86,158/x
3. Step 3: Cross multiply
   57,400x = 86,158 × 86,158
4. Step 4: Simplify right side
   57,400x = 7,423,200,964
5. Step 5: Solve for x
   x = 7,423,200,964/57,400
6. Step 6: Final answer
   x = 129,324.06