Finding the Fourth Proportional to 2,131.57, 2,925.80 and 1,890.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.57 : 2,925.80 = 1,890.26 : x
2. Step 2: Convert to fraction form
   2,131.57/2,925.80 = 1,890.26/x
3. Step 3: Cross multiply
   2,131.57x = 2,925.80 × 1,890.26
4. Step 4: Simplify right side
   2,131.57x = 5,530,516.69
5. Step 5: Solve for x
   x = 5,530,516.69/2,131.57
6. Step 6: Final answer
   x = 2,594.57