Finding the Fourth Proportional to 9,278.16, 12,801.90 and 5,554.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,278.16 : 12,801.90 = 5,554.32 : x
2. Step 2: Convert to fraction form
   9,278.16/12,801.90 = 5,554.32/x
3. Step 3: Cross multiply
   9,278.16x = 12,801.90 × 5,554.32
4. Step 4: Simplify right side
   9,278.16x = 71,105,849.21
5. Step 5: Solve for x
   x = 71,105,849.21/9,278.16
6. Step 6: Final answer
   x = 7,663.79