Finding the Fourth Proportional to 1,152.60, 1,588.68 and 1,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.60 : 1,588.68 = 1,086.72 : x
2. Step 2: Convert to fraction form
   1,152.60/1,588.68 = 1,086.72/x
3. Step 3: Cross multiply
   1,152.60x = 1,588.68 × 1,086.72
4. Step 4: Simplify right side
   1,152.60x = 1,726,450.33
5. Step 5: Solve for x
   x = 1,726,450.33/1,152.60
6. Step 6: Final answer
   x = 1,497.87