Finding the Third Proportional to 59,280 and 128,401.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,280 : 128,401.50 = 128,401.50 : x
2. Step 2: Convert to fraction form
   59,280/128,401.50 = 128,401.50/x
3. Step 3: Cross multiply
   59,280x = 128,401.50 × 128,401.50
4. Step 4: Simplify right side
   59,280x = 16,486,945,202.25
5. Step 5: Solve for x
   x = 16,486,945,202.25/59,280
6. Step 6: Final answer
   x = 278,119.86