Finding the Fourth Proportional to 1,090.42, 1,504.78 and 593.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.42 : 1,504.78 = 593.06 : x
2. Step 2: Convert to fraction form
   1,090.42/1,504.78 = 593.06/x
3. Step 3: Cross multiply
   1,090.42x = 1,504.78 × 593.06
4. Step 4: Simplify right side
   1,090.42x = 892,424.83
5. Step 5: Solve for x
   x = 892,424.83/1,090.42
6. Step 6: Final answer
   x = 818.42