Finding the Fourth Proportional to 2,091.22, 2,879.76 and 1,870.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.22 : 2,879.76 = 1,870.10 : x
2. Step 2: Convert to fraction form
   2,091.22/2,879.76 = 1,870.10/x
3. Step 3: Cross multiply
   2,091.22x = 2,879.76 × 1,870.10
4. Step 4: Simplify right side
   2,091.22x = 5,385,439.18
5. Step 5: Solve for x
   x = 5,385,439.18/2,091.22
6. Step 6: Final answer
   x = 2,575.26