Finding the Fourth Proportional to 1,531.72, 2,113.86 and 833.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.72 : 2,113.86 = 833.08 : x
2. Step 2: Convert to fraction form
   1,531.72/2,113.86 = 833.08/x
3. Step 3: Cross multiply
   1,531.72x = 2,113.86 × 833.08
4. Step 4: Simplify right side
   1,531.72x = 1,761,014.49
5. Step 5: Solve for x
   x = 1,761,014.49/1,531.72
6. Step 6: Final answer
   x = 1,149.70