Finding the Third Proportional to 163,200 and 245,280

Step by Step Solution

1. Step 1: Write the proportion equation
   163,200 : 245,280 = 245,280 : x
2. Step 2: Convert to fraction form
   163,200/245,280 = 245,280/x
3. Step 3: Cross multiply
   163,200x = 245,280 × 245,280
4. Step 4: Simplify right side
   163,200x = 60,162,278,400
5. Step 5: Solve for x
   x = 60,162,278,400/163,200
6. Step 6: Final answer
   x = 368,641.41