Finding the Fourth Proportional to 2,837.61, 4,251.69 and 987.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,837.61 : 4,251.69 = 987.71 : x
2. Step 2: Convert to fraction form
   2,837.61/4,251.69 = 987.71/x
3. Step 3: Cross multiply
   2,837.61x = 4,251.69 × 987.71
4. Step 4: Simplify right side
   2,837.61x = 4,199,415.47
5. Step 5: Solve for x
   x = 4,199,415.47/2,837.61
6. Step 6: Final answer
   x = 1,479.91