Finding the Fourth Proportional to 8,825.47, 12,178.77 and 5,290.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,825.47 : 12,178.77 = 5,290.63 : x
2. Step 2: Convert to fraction form
   8,825.47/12,178.77 = 5,290.63/x
3. Step 3: Cross multiply
   8,825.47x = 12,178.77 × 5,290.63
4. Step 4: Simplify right side
   8,825.47x = 64,433,315.64
5. Step 5: Solve for x
   x = 64,433,315.64/8,825.47
6. Step 6: Final answer
   x = 7,300.84