Finding the Third Proportional to 155,580 and 240,280

Step by Step Solution

1. Step 1: Write the proportion equation
   155,580 : 240,280 = 240,280 : x
2. Step 2: Convert to fraction form
   155,580/240,280 = 240,280/x
3. Step 3: Cross multiply
   155,580x = 240,280 × 240,280
4. Step 4: Simplify right side
   155,580x = 57,734,478,400
5. Step 5: Solve for x
   x = 57,734,478,400/155,580
6. Step 6: Final answer
   x = 371,091.90