Finding the Fourth Proportional to 1,354.89, 1,869.48 and 1,040.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.89 : 1,869.48 = 1,040.51 : x
2. Step 2: Convert to fraction form
   1,354.89/1,869.48 = 1,040.51/x
3. Step 3: Cross multiply
   1,354.89x = 1,869.48 × 1,040.51
4. Step 4: Simplify right side
   1,354.89x = 1,945,217.31
5. Step 5: Solve for x
   x = 1,945,217.31/1,354.89
6. Step 6: Final answer
   x = 1,435.70