Finding the Fourth Proportional to 2,374.89, 3,559.29 and 987.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,374.89 : 3,559.29 = 987.36 : x
2. Step 2: Convert to fraction form
   2,374.89/3,559.29 = 987.36/x
3. Step 3: Cross multiply
   2,374.89x = 3,559.29 × 987.36
4. Step 4: Simplify right side
   2,374.89x = 3,514,300.57
5. Step 5: Solve for x
   x = 3,514,300.57/2,374.89
6. Step 6: Final answer
   x = 1,479.77