Finding the Third Proportional to 69,320 and 147,280

Step by Step Solution

1. Step 1: Write the proportion equation
   69,320 : 147,280 = 147,280 : x
2. Step 2: Convert to fraction form
   69,320/147,280 = 147,280/x
3. Step 3: Cross multiply
   69,320x = 147,280 × 147,280
4. Step 4: Simplify right side
   69,320x = 21,691,398,400
5. Step 5: Solve for x
   x = 21,691,398,400/69,320
6. Step 6: Final answer
   x = 312,916.88