Finding the Fourth Proportional to 2,085.62, 2,870.84 and 1,888.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.62 : 2,870.84 = 1,888.79 : x
2. Step 2: Convert to fraction form
   2,085.62/2,870.84 = 1,888.79/x
3. Step 3: Cross multiply
   2,085.62x = 2,870.84 × 1,888.79
4. Step 4: Simplify right side
   2,085.62x = 5,422,404.25
5. Step 5: Solve for x
   x = 5,422,404.25/2,085.62
6. Step 6: Final answer
   x = 2,599.91