Finding the Fourth Proportional to 10,554.48, 15,841.32 and 7,288.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,554.48 : 15,841.32 = 7,288.56 : x
2. Step 2: Convert to fraction form
   10,554.48/15,841.32 = 7,288.56/x
3. Step 3: Cross multiply
   10,554.48x = 15,841.32 × 7,288.56
4. Step 4: Simplify right side
   10,554.48x = 115,460,411.30
5. Step 5: Solve for x
   x = 115,460,411.30/10,554.48
6. Step 6: Final answer
   x = 10,939.47