Finding the Third Proportional to 1,139,520 and 2,431,590

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,520 : 2,431,590 = 2,431,590 : x
2. Step 2: Convert to fraction form
   1,139,520/2,431,590 = 2,431,590/x
3. Step 3: Cross multiply
   1,139,520x = 2,431,590 × 2,431,590
4. Step 4: Simplify right side
   1,139,520x = 5,912,629,928,100
5. Step 5: Solve for x
   x = 5,912,629,928,100/1,139,520
6. Step 6: Final answer
   x = 5,188,702.20