Finding the Third Proportional to 128,002.50 and 169,854

Step by Step Solution

1. Step 1: Write the proportion equation
   128,002.50 : 169,854 = 169,854 : x
2. Step 2: Convert to fraction form
   128,002.50/169,854 = 169,854/x
3. Step 3: Cross multiply
   128,002.50x = 169,854 × 169,854
4. Step 4: Simplify right side
   128,002.50x = 28,850,381,316
5. Step 5: Solve for x
   x = 28,850,381,316/128,002.50
6. Step 6: Final answer
   x = 225,389.20