Finding the Fourth Proportional to 2,090.61, 2,884.71 and 1,251.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.61 : 2,884.71 = 1,251.20 : x
2. Step 2: Convert to fraction form
   2,090.61/2,884.71 = 1,251.20/x
3. Step 3: Cross multiply
   2,090.61x = 2,884.71 × 1,251.20
4. Step 4: Simplify right side
   2,090.61x = 3,609,361.06
5. Step 5: Solve for x
   x = 3,609,361.06/2,090.61
6. Step 6: Final answer
   x = 1,726.46