Finding the Fourth Proportional to 1,131.89, 1,686.48 and 1,009.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.89 : 1,686.48 = 1,009.13 : x
2. Step 2: Convert to fraction form
   1,131.89/1,686.48 = 1,009.13/x
3. Step 3: Cross multiply
   1,131.89x = 1,686.48 × 1,009.13
4. Step 4: Simplify right side
   1,131.89x = 1,701,872.52
5. Step 5: Solve for x
   x = 1,701,872.52/1,131.89
6. Step 6: Final answer
   x = 1,503.57