Finding the Third Proportional to 653,440 and 1,386,188

Step by Step Solution

1. Step 1: Write the proportion equation
   653,440 : 1,386,188 = 1,386,188 : x
2. Step 2: Convert to fraction form
   653,440/1,386,188 = 1,386,188/x
3. Step 3: Cross multiply
   653,440x = 1,386,188 × 1,386,188
4. Step 4: Simplify right side
   653,440x = 1,921,517,171,344
5. Step 5: Solve for x
   x = 1,921,517,171,344/653,440
6. Step 6: Final answer
   x = 2,940,617.61