Finding the Fourth Proportional to 2,604.48, 3,591.60 and 2,106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,604.48 : 3,591.60 = 2,106.72 : x
2. Step 2: Convert to fraction form
   2,604.48/3,591.60 = 2,106.72/x
3. Step 3: Cross multiply
   2,604.48x = 3,591.60 × 2,106.72
4. Step 4: Simplify right side
   2,604.48x = 7,566,495.55
5. Step 5: Solve for x
   x = 7,566,495.55/2,604.48
6. Step 6: Final answer
   x = 2,905.18