Finding the Fourth Proportional to 1,371.66, 1,890.39 and 1,090.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.66 : 1,890.39 = 1,090.77 : x
2. Step 2: Convert to fraction form
   1,371.66/1,890.39 = 1,090.77/x
3. Step 3: Cross multiply
   1,371.66x = 1,890.39 × 1,090.77
4. Step 4: Simplify right side
   1,371.66x = 2,061,971.57
5. Step 5: Solve for x
   x = 2,061,971.57/1,371.66
6. Step 6: Final answer
   x = 1,503.27