Finding the Fourth Proportional to 2,187.33, 3,011.94 and 1,870.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.33 : 3,011.94 = 1,870.21 : x
2. Step 2: Convert to fraction form
   2,187.33/3,011.94 = 1,870.21/x
3. Step 3: Cross multiply
   2,187.33x = 3,011.94 × 1,870.21
4. Step 4: Simplify right side
   2,187.33x = 5,632,960.31
5. Step 5: Solve for x
   x = 5,632,960.31/2,187.33
6. Step 6: Final answer
   x = 2,575.27