Finding the Fourth Proportional to 3,127.91, 4,345.47 and 3,099.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,127.91 : 4,345.47 = 3,099.35 : x
2. Step 2: Convert to fraction form
   3,127.91/4,345.47 = 3,099.35/x
3. Step 3: Cross multiply
   3,127.91x = 4,345.47 × 3,099.35
4. Step 4: Simplify right side
   3,127.91x = 13,468,143.31
5. Step 5: Solve for x
   x = 13,468,143.31/3,127.91
6. Step 6: Final answer
   x = 4,305.80