Finding the Fourth Proportional to 2,111.32, 3,166.80 and 725.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.32 : 3,166.80 = 725.16 : x
2. Step 2: Convert to fraction form
   2,111.32/3,166.80 = 725.16/x
3. Step 3: Cross multiply
   2,111.32x = 3,166.80 × 725.16
4. Step 4: Simplify right side
   2,111.32x = 2,296,436.69
5. Step 5: Solve for x
   x = 2,296,436.69/2,111.32
6. Step 6: Final answer
   x = 1,087.68