Finding the Third Proportional to 163,180.50 and 253,200

Step by Step Solution

1. Step 1: Write the proportion equation
   163,180.50 : 253,200 = 253,200 : x
2. Step 2: Convert to fraction form
   163,180.50/253,200 = 253,200/x
3. Step 3: Cross multiply
   163,180.50x = 253,200 × 253,200
4. Step 4: Simplify right side
   163,180.50x = 64,110,240,000
5. Step 5: Solve for x
   x = 64,110,240,000/163,180.50
6. Step 6: Final answer
   x = 392,879.30