Finding the Fourth Proportional to 1,055.89, 1,581.78 and 535.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.89 : 1,581.78 = 535.26 : x
2. Step 2: Convert to fraction form
   1,055.89/1,581.78 = 535.26/x
3. Step 3: Cross multiply
   1,055.89x = 1,581.78 × 535.26
4. Step 4: Simplify right side
   1,055.89x = 846,659.59
5. Step 5: Solve for x
   x = 846,659.59/1,055.89
6. Step 6: Final answer
   x = 801.85