Finding the Third Proportional to 163,339 and 252,359.50

Step by Step Solution

1. Step 1: Write the proportion equation
   163,339 : 252,359.50 = 252,359.50 : x
2. Step 2: Convert to fraction form
   163,339/252,359.50 = 252,359.50/x
3. Step 3: Cross multiply
   163,339x = 252,359.50 × 252,359.50
4. Step 4: Simplify right side
   163,339x = 63,685,317,240.25
5. Step 5: Solve for x
   x = 63,685,317,240.25/163,339
6. Step 6: Final answer
   x = 389,896.58