Finding the Fourth Proportional to 1,858.35, 2,561.85 and 1,149.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.35 : 2,561.85 = 1,149.72 : x
2. Step 2: Convert to fraction form
   1,858.35/2,561.85 = 1,149.72/x
3. Step 3: Cross multiply
   1,858.35x = 2,561.85 × 1,149.72
4. Step 4: Simplify right side
   1,858.35x = 2,945,410.18
5. Step 5: Solve for x
   x = 2,945,410.18/1,858.35
6. Step 6: Final answer
   x = 1,584.96