Finding the Fourth Proportional to 3,371.74, 5,056.20 and 1,987.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,371.74 : 5,056.20 = 1,987.86 : x
2. Step 2: Convert to fraction form
   3,371.74/5,056.20 = 1,987.86/x
3. Step 3: Cross multiply
   3,371.74x = 5,056.20 × 1,987.86
4. Step 4: Simplify right side
   3,371.74x = 10,051,017.73
5. Step 5: Solve for x
   x = 10,051,017.73/3,371.74
6. Step 6: Final answer
   x = 2,980.96