Finding the Fourth Proportional to 2,187.76, 3,281.72 and 726.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.76 : 3,281.72 = 726.93 : x
2. Step 2: Convert to fraction form
   2,187.76/3,281.72 = 726.93/x
3. Step 3: Cross multiply
   2,187.76x = 3,281.72 × 726.93
4. Step 4: Simplify right side
   2,187.76x = 2,385,580.72
5. Step 5: Solve for x
   x = 2,385,580.72/2,187.76
6. Step 6: Final answer
   x = 1,090.42