Finding the Third Proportional to 57,706.17 and 86,328.28

Step by Step Solution

1. Step 1: Write the proportion equation
   57,706.17 : 86,328.28 = 86,328.28 : x
2. Step 2: Convert to fraction form
   57,706.17/86,328.28 = 86,328.28/x
3. Step 3: Cross multiply
   57,706.17x = 86,328.28 × 86,328.28
4. Step 4: Simplify right side
   57,706.17x = 7,452,572,143.58
5. Step 5: Solve for x
   x = 7,452,572,143.58/57,706.17
6. Step 6: Final answer
   x = 129,146.88