Finding the Fourth Proportional to 2,558.89, 3,530.17 and 1,851.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.89 : 3,530.17 = 1,851.15 : x
2. Step 2: Convert to fraction form
   2,558.89/3,530.17 = 1,851.15/x
3. Step 3: Cross multiply
   2,558.89x = 3,530.17 × 1,851.15
4. Step 4: Simplify right side
   2,558.89x = 6,534,876.51
5. Step 5: Solve for x
   x = 6,534,876.51/2,558.89
6. Step 6: Final answer
   x = 2,553.80