Finding the Third Proportional to 559,440 and 1,218,456

Step by Step Solution

1. Step 1: Write the proportion equation
   559,440 : 1,218,456 = 1,218,456 : x
2. Step 2: Convert to fraction form
   559,440/1,218,456 = 1,218,456/x
3. Step 3: Cross multiply
   559,440x = 1,218,456 × 1,218,456
4. Step 4: Simplify right side
   559,440x = 1,484,635,023,936
5. Step 5: Solve for x
   x = 1,484,635,023,936/559,440
6. Step 6: Final answer
   x = 2,653,787.76