Finding the Third Proportional to 163,311 and 252,364.50

Step by Step Solution

1. Step 1: Write the proportion equation
   163,311 : 252,364.50 = 252,364.50 : x
2. Step 2: Convert to fraction form
   163,311/252,364.50 = 252,364.50/x
3. Step 3: Cross multiply
   163,311x = 252,364.50 × 252,364.50
4. Step 4: Simplify right side
   163,311x = 63,687,840,860.25
5. Step 5: Solve for x
   x = 63,687,840,860.25/163,311
6. Step 6: Final answer
   x = 389,978.88