Finding the Fourth Proportional to 3,998,665.78, 5,518,021.53 and 2,280,339.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998,665.78 : 5,518,021.53 = 2,280,339.34 : x
2. Step 2: Convert to fraction form
   3,998,665.78/5,518,021.53 = 2,280,339.34/x
3. Step 3: Cross multiply
   3,998,665.78x = 5,518,021.53 × 2,280,339.34
4. Step 4: Simplify right side
   3,998,665.78x = 12,582,961,573,825.99
5. Step 5: Solve for x
   x = 12,582,961,573,825.99/3,998,665.78
6. Step 6: Final answer
   x = 3,146,790.02