Finding the Fourth Proportional to 2,572.59, 3,856.56 and 927.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.59 : 3,856.56 = 927.99 : x
2. Step 2: Convert to fraction form
   2,572.59/3,856.56 = 927.99/x
3. Step 3: Cross multiply
   2,572.59x = 3,856.56 × 927.99
4. Step 4: Simplify right side
   2,572.59x = 3,578,849.11
5. Step 5: Solve for x
   x = 3,578,849.11/2,572.59
6. Step 6: Final answer
   x = 1,391.15