Finding the Third Proportional to 163,109 and 252,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   163,109 : 252,085.50 = 252,085.50 : x
2. Step 2: Convert to fraction form
   163,109/252,085.50 = 252,085.50/x
3. Step 3: Cross multiply
   163,109x = 252,085.50 × 252,085.50
4. Step 4: Simplify right side
   163,109x = 63,547,099,310.25
5. Step 5: Solve for x
   x = 63,547,099,310.25/163,109
6. Step 6: Final answer
   x = 389,598.98