Finding the Fourth Proportional to 8,826.78, 12,180.58 and 5,291.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,826.78 : 12,180.58 = 5,291.94 : x
2. Step 2: Convert to fraction form
   8,826.78/12,180.58 = 5,291.94/x
3. Step 3: Cross multiply
   8,826.78x = 12,180.58 × 5,291.94
4. Step 4: Simplify right side
   8,826.78x = 64,458,885.30
5. Step 5: Solve for x
   x = 64,458,885.30/8,826.78
6. Step 6: Final answer
   x = 7,302.65