Finding the Fourth Proportional to 2,487.81, 3,731.69 and 927.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,487.81 : 3,731.69 = 927.76 : x
2. Step 2: Convert to fraction form
   2,487.81/3,731.69 = 927.76/x
3. Step 3: Cross multiply
   2,487.81x = 3,731.69 × 927.76
4. Step 4: Simplify right side
   2,487.81x = 3,462,112.71
5. Step 5: Solve for x
   x = 3,462,112.71/2,487.81
6. Step 6: Final answer
   x = 1,391.63