Finding the Third Proportional to 584,408 and 1,431,440

Step by Step Solution

1. Step 1: Write the proportion equation
   584,408 : 1,431,440 = 1,431,440 : x
2. Step 2: Convert to fraction form
   584,408/1,431,440 = 1,431,440/x
3. Step 3: Cross multiply
   584,408x = 1,431,440 × 1,431,440
4. Step 4: Simplify right side
   584,408x = 2,049,020,473,600
5. Step 5: Solve for x
   x = 2,049,020,473,600/584,408
6. Step 6: Final answer
   x = 3,506,147.20