Finding the Third Proportional to 1,578,490 and 3,409,200

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578,490 : 3,409,200 = 3,409,200 : x
2. Step 2: Convert to fraction form
   1,578,490/3,409,200 = 3,409,200/x
3. Step 3: Cross multiply
   1,578,490x = 3,409,200 × 3,409,200
4. Step 4: Simplify right side
   1,578,490x = 11,622,644,640,000
5. Step 5: Solve for x
   x = 11,622,644,640,000/1,578,490
6. Step 6: Final answer
   x = 7,363,141.13