Finding the Fourth Proportional to 1,085.88, 1,498.51 and 588.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.88 : 1,498.51 = 588.51 : x
2. Step 2: Convert to fraction form
   1,085.88/1,498.51 = 588.51/x
3. Step 3: Cross multiply
   1,085.88x = 1,498.51 × 588.51
4. Step 4: Simplify right side
   1,085.88x = 881,885.18
5. Step 5: Solve for x
   x = 881,885.18/1,085.88
6. Step 6: Final answer
   x = 812.14