Finding the Fourth Proportional to 3,377.16, 5,057.91 and 1,987.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,377.16 : 5,057.91 = 1,987.74 : x
2. Step 2: Convert to fraction form
   3,377.16/5,057.91 = 1,987.74/x
3. Step 3: Cross multiply
   3,377.16x = 5,057.91 × 1,987.74
4. Step 4: Simplify right side
   3,377.16x = 10,053,810.02
5. Step 5: Solve for x
   x = 10,053,810.02/3,377.16
6. Step 6: Final answer
   x = 2,977.00