Finding the Third Proportional to 646,112 and 1,509,200

Step by Step Solution

1. Step 1: Write the proportion equation
   646,112 : 1,509,200 = 1,509,200 : x
2. Step 2: Convert to fraction form
   646,112/1,509,200 = 1,509,200/x
3. Step 3: Cross multiply
   646,112x = 1,509,200 × 1,509,200
4. Step 4: Simplify right side
   646,112x = 2,277,684,640,000
5. Step 5: Solve for x
   x = 2,277,684,640,000/646,112
6. Step 6: Final answer
   x = 3,525,216.43