Finding the Fourth Proportional to 3,345.81, 5,018.69 and 2,616

Step by Step Solution

1. Step 1: Write the proportion equation
   3,345.81 : 5,018.69 = 2,616 : x
2. Step 2: Convert to fraction form
   3,345.81/5,018.69 = 2,616/x
3. Step 3: Cross multiply
   3,345.81x = 5,018.69 × 2,616
4. Step 4: Simplify right side
   3,345.81x = 13,128,899.58
5. Step 5: Solve for x
   x = 13,128,899.58/3,345.81
6. Step 6: Final answer
   x = 3,923.98