Finding the Fourth Proportional to 1,821.91, 2,513.85 and 1,158.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,821.91 : 2,513.85 = 1,158.52 : x
2. Step 2: Convert to fraction form
   1,821.91/2,513.85 = 1,158.52/x
3. Step 3: Cross multiply
   1,821.91x = 2,513.85 × 1,158.52
4. Step 4: Simplify right side
   1,821.91x = 2,912,345.50
5. Step 5: Solve for x
   x = 2,912,345.50/1,821.91
6. Step 6: Final answer
   x = 1,598.51