Finding the Fourth Proportional to 2,042.15, 3,060.81 and 987.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.15 : 3,060.81 = 987.30 : x
2. Step 2: Convert to fraction form
   2,042.15/3,060.81 = 987.30/x
3. Step 3: Cross multiply
   2,042.15x = 3,060.81 × 987.30
4. Step 4: Simplify right side
   2,042.15x = 3,021,937.71
5. Step 5: Solve for x
   x = 3,021,937.71/2,042.15
6. Step 6: Final answer
   x = 1,479.79