Finding the Third Proportional to 59,400 and 128,155.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,400 : 128,155.50 = 128,155.50 : x
2. Step 2: Convert to fraction form
   59,400/128,155.50 = 128,155.50/x
3. Step 3: Cross multiply
   59,400x = 128,155.50 × 128,155.50
4. Step 4: Simplify right side
   59,400x = 16,423,832,180.25
5. Step 5: Solve for x
   x = 16,423,832,180.25/59,400
6. Step 6: Final answer
   x = 276,495.49