Finding the Third Proportional to 163,359 and 252,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   163,359 : 252,391.50 = 252,391.50 : x
2. Step 2: Convert to fraction form
   163,359/252,391.50 = 252,391.50/x
3. Step 3: Cross multiply
   163,359x = 252,391.50 × 252,391.50
4. Step 4: Simplify right side
   163,359x = 63,701,469,272.25
5. Step 5: Solve for x
   x = 63,701,469,272.25/163,359
6. Step 6: Final answer
   x = 389,947.72