Finding the Fourth Proportional to 2,402.82, 3,603.15 and 1,987.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,402.82 : 3,603.15 = 1,987.29 : x
2. Step 2: Convert to fraction form
   2,402.82/3,603.15 = 1,987.29/x
3. Step 3: Cross multiply
   2,402.82x = 3,603.15 × 1,987.29
4. Step 4: Simplify right side
   2,402.82x = 7,160,503.96
5. Step 5: Solve for x
   x = 7,160,503.96/2,402.82
6. Step 6: Final answer
   x = 2,980.04