Finding the Third Proportional to 59,295.50 and 128,432

Step by Step Solution

1. Step 1: Write the proportion equation
   59,295.50 : 128,432 = 128,432 : x
2. Step 2: Convert to fraction form
   59,295.50/128,432 = 128,432/x
3. Step 3: Cross multiply
   59,295.50x = 128,432 × 128,432
4. Step 4: Simplify right side
   59,295.50x = 16,494,778,624
5. Step 5: Solve for x
   x = 16,494,778,624/59,295.50
6. Step 6: Final answer
   x = 278,179.27