Finding the Third Proportional to 163,368 and 256,729.50

Step by Step Solution

1. Step 1: Write the proportion equation
   163,368 : 256,729.50 = 256,729.50 : x
2. Step 2: Convert to fraction form
   163,368/256,729.50 = 256,729.50/x
3. Step 3: Cross multiply
   163,368x = 256,729.50 × 256,729.50
4. Step 4: Simplify right side
   163,368x = 65,910,036,170.25
5. Step 5: Solve for x
   x = 65,910,036,170.25/163,368
6. Step 6: Final answer
   x = 403,445.20