Finding the Fourth Proportional to 3,139.85, 4,334.59 and 2,430.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.85 : 4,334.59 = 2,430.09 : x
2. Step 2: Convert to fraction form
   3,139.85/4,334.59 = 2,430.09/x
3. Step 3: Cross multiply
   3,139.85x = 4,334.59 × 2,430.09
4. Step 4: Simplify right side
   3,139.85x = 10,533,443.81
5. Step 5: Solve for x
   x = 10,533,443.81/3,139.85
6. Step 6: Final answer
   x = 3,354.76