Finding the Fourth Proportional to 2,557.86, 3,529.38 and 1,613.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.86 : 3,529.38 = 1,613.00 : x
2. Step 2: Convert to fraction form
   2,557.86/3,529.38 = 1,613.00/x
3. Step 3: Cross multiply
   2,557.86x = 3,529.38 × 1,613.00
4. Step 4: Simplify right side
   2,557.86x = 5,692,872.29
5. Step 5: Solve for x
   x = 5,692,872.29/2,557.86
6. Step 6: Final answer
   x = 2,225.64