Finding the Fourth Proportional to 1,511.20, 2,081.55 and 1,068.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,511.20 : 2,081.55 = 1,068.33 : x
2. Step 2: Convert to fraction form
   1,511.20/2,081.55 = 1,068.33/x
3. Step 3: Cross multiply
   1,511.20x = 2,081.55 × 1,068.33
4. Step 4: Simplify right side
   1,511.20x = 2,223,782.31
5. Step 5: Solve for x
   x = 2,223,782.31/1,511.20
6. Step 6: Final answer
   x = 1,471.53