Finding the Third Proportional to 57,436 and 86,700

Step by Step Solution

1. Step 1: Write the proportion equation
   57,436 : 86,700 = 86,700 : x
2. Step 2: Convert to fraction form
   57,436/86,700 = 86,700/x
3. Step 3: Cross multiply
   57,436x = 86,700 × 86,700
4. Step 4: Simplify right side
   57,436x = 7,516,890,000
5. Step 5: Solve for x
   x = 7,516,890,000/57,436
6. Step 6: Final answer
   x = 130,874.19