Finding the Fourth Proportional to 1,335.56, 1,842.84 and 811.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.56 : 1,842.84 = 811.52 : x
2. Step 2: Convert to fraction form
   1,335.56/1,842.84 = 811.52/x
3. Step 3: Cross multiply
   1,335.56x = 1,842.84 × 811.52
4. Step 4: Simplify right side
   1,335.56x = 1,495,501.52
5. Step 5: Solve for x
   x = 1,495,501.52/1,335.56
6. Step 6: Final answer
   x = 1,119.76