Finding the Fourth Proportional to 1,531.05, 2,109.83 and 1,087.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.05 : 2,109.83 = 1,087.71 : x
2. Step 2: Convert to fraction form
   1,531.05/2,109.83 = 1,087.71/x
3. Step 3: Cross multiply
   1,531.05x = 2,109.83 × 1,087.71
4. Step 4: Simplify right side
   1,531.05x = 2,294,877.75
5. Step 5: Solve for x
   x = 2,294,877.75/1,531.05
6. Step 6: Final answer
   x = 1,498.89