Finding the Third Proportional to 582,420 and 1,272,600

Step by Step Solution

1. Step 1: Write the proportion equation
   582,420 : 1,272,600 = 1,272,600 : x
2. Step 2: Convert to fraction form
   582,420/1,272,600 = 1,272,600/x
3. Step 3: Cross multiply
   582,420x = 1,272,600 × 1,272,600
4. Step 4: Simplify right side
   582,420x = 1,619,510,760,000
5. Step 5: Solve for x
   x = 1,619,510,760,000/582,420
6. Step 6: Final answer
   x = 2,780,657.88