Finding the Third Proportional to 1,386,432 and 2,979,200

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386,432 : 2,979,200 = 2,979,200 : x
2. Step 2: Convert to fraction form
   1,386,432/2,979,200 = 2,979,200/x
3. Step 3: Cross multiply
   1,386,432x = 2,979,200 × 2,979,200
4. Step 4: Simplify right side
   1,386,432x = 8,875,632,640,000
5. Step 5: Solve for x
   x = 8,875,632,640,000/1,386,432
6. Step 6: Final answer
   x = 6,401,779.99