Finding the Fourth Proportional to 2,617.21, 3,611.55 and 1,569.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.21 : 3,611.55 = 1,569.07 : x
2. Step 2: Convert to fraction form
   2,617.21/3,611.55 = 1,569.07/x
3. Step 3: Cross multiply
   2,617.21x = 3,611.55 × 1,569.07
4. Step 4: Simplify right side
   2,617.21x = 5,666,774.76
5. Step 5: Solve for x
   x = 5,666,774.76/2,617.21
6. Step 6: Final answer
   x = 2,165.20