Finding the Fourth Proportional to 3,004.30, 4,147.98 and 2,688.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,004.30 : 4,147.98 = 2,688.61 : x
2. Step 2: Convert to fraction form
   3,004.30/4,147.98 = 2,688.61/x
3. Step 3: Cross multiply
   3,004.30x = 4,147.98 × 2,688.61
4. Step 4: Simplify right side
   3,004.30x = 11,152,300.51
5. Step 5: Solve for x
   x = 11,152,300.51/3,004.30
6. Step 6: Final answer
   x = 3,712.11