Finding the Fourth Proportional to 1,085.55, 1,498.06 and 588.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.55 : 1,498.06 = 588.18 : x
2. Step 2: Convert to fraction form
   1,085.55/1,498.06 = 588.18/x
3. Step 3: Cross multiply
   1,085.55x = 1,498.06 × 588.18
4. Step 4: Simplify right side
   1,085.55x = 881,128.93
5. Step 5: Solve for x
   x = 881,128.93/1,085.55
6. Step 6: Final answer
   x = 811.69