Finding the Third Proportional to 59,689.50 and 129,222

Step by Step Solution

1. Step 1: Write the proportion equation
   59,689.50 : 129,222 = 129,222 : x
2. Step 2: Convert to fraction form
   59,689.50/129,222 = 129,222/x
3. Step 3: Cross multiply
   59,689.50x = 129,222 × 129,222
4. Step 4: Simplify right side
   59,689.50x = 16,698,325,284
5. Step 5: Solve for x
   x = 16,698,325,284/59,689.50
6. Step 6: Final answer
   x = 279,753.14