Finding the Third Proportional to 742,320 and 1,617,120

Step by Step Solution

1. Step 1: Write the proportion equation
   742,320 : 1,617,120 = 1,617,120 : x
2. Step 2: Convert to fraction form
   742,320/1,617,120 = 1,617,120/x
3. Step 3: Cross multiply
   742,320x = 1,617,120 × 1,617,120
4. Step 4: Simplify right side
   742,320x = 2,615,077,094,400
5. Step 5: Solve for x
   x = 2,615,077,094,400/742,320
6. Step 6: Final answer
   x = 3,522,843.38