Finding the Fourth Proportional to 1,345.59, 1,855.85 and 1,083.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.59 : 1,855.85 = 1,083.15 : x
2. Step 2: Convert to fraction form
   1,345.59/1,855.85 = 1,083.15/x
3. Step 3: Cross multiply
   1,345.59x = 1,855.85 × 1,083.15
4. Step 4: Simplify right side
   1,345.59x = 2,010,158.51
5. Step 5: Solve for x
   x = 2,010,158.51/1,345.59
6. Step 6: Final answer
   x = 1,493.89