Finding the Fourth Proportional to 3,987.17, 5,499.85 and 2,570.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987.17 : 5,499.85 = 2,570.33 : x
2. Step 2: Convert to fraction form
   3,987.17/5,499.85 = 2,570.33/x
3. Step 3: Cross multiply
   3,987.17x = 5,499.85 × 2,570.33
4. Step 4: Simplify right side
   3,987.17x = 14,136,441.59
5. Step 5: Solve for x
   x = 14,136,441.59/3,987.17
6. Step 6: Final answer
   x = 3,545.48