Finding the Fourth Proportional to 3,111.76, 4,288.60 and 2,523.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.76 : 4,288.60 = 2,523.72 : x
2. Step 2: Convert to fraction form
   3,111.76/4,288.60 = 2,523.72/x
3. Step 3: Cross multiply
   3,111.76x = 4,288.60 × 2,523.72
4. Step 4: Simplify right side
   3,111.76x = 10,823,225.59
5. Step 5: Solve for x
   x = 10,823,225.59/3,111.76
6. Step 6: Final answer
   x = 3,478.17