Finding the Third Proportional to 163,491 and 253,255.50

Step by Step Solution

1. Step 1: Write the proportion equation
   163,491 : 253,255.50 = 253,255.50 : x
2. Step 2: Convert to fraction form
   163,491/253,255.50 = 253,255.50/x
3. Step 3: Cross multiply
   163,491x = 253,255.50 × 253,255.50
4. Step 4: Simplify right side
   163,491x = 64,138,348,280.25
5. Step 5: Solve for x
   x = 64,138,348,280.25/163,491
6. Step 6: Final answer
   x = 392,305.07