Finding the Fourth Proportional to 2,601.72, 3,904.31 and 2,428.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.72 : 3,904.31 = 2,428.72 : x
2. Step 2: Convert to fraction form
   2,601.72/3,904.31 = 2,428.72/x
3. Step 3: Cross multiply
   2,601.72x = 3,904.31 × 2,428.72
4. Step 4: Simplify right side
   2,601.72x = 9,482,482.79
5. Step 5: Solve for x
   x = 9,482,482.79/2,601.72
6. Step 6: Final answer
   x = 3,644.70