Finding the Fourth Proportional to 2,090.22, 2,878.38 and 1,869.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.22 : 2,878.38 = 1,869.10 : x
2. Step 2: Convert to fraction form
   2,090.22/2,878.38 = 1,869.10/x
3. Step 3: Cross multiply
   2,090.22x = 2,878.38 × 1,869.10
4. Step 4: Simplify right side
   2,090.22x = 5,379,980.06
5. Step 5: Solve for x
   x = 5,379,980.06/2,090.22
6. Step 6: Final answer
   x = 2,573.88