Finding the Fourth Proportional to 2,547.78, 3,821.45 and 792.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,547.78 : 3,821.45 = 792.71 : x
2. Step 2: Convert to fraction form
   2,547.78/3,821.45 = 792.71/x
3. Step 3: Cross multiply
   2,547.78x = 3,821.45 × 792.71
4. Step 4: Simplify right side
   2,547.78x = 3,029,278.56
5. Step 5: Solve for x
   x = 3,029,278.56/2,547.78
6. Step 6: Final answer
   x = 1,188.99