Finding the Third Proportional to 478,380 and 740,250

Step by Step Solution

1. Step 1: Write the proportion equation
   478,380 : 740,250 = 740,250 : x
2. Step 2: Convert to fraction form
   478,380/740,250 = 740,250/x
3. Step 3: Cross multiply
   478,380x = 740,250 × 740,250
4. Step 4: Simplify right side
   478,380x = 547,970,062,500
5. Step 5: Solve for x
   x = 547,970,062,500/478,380
6. Step 6: Final answer
   x = 1,145,470.26