Finding the Fourth Proportional to 10,918.52, 15,054.72 and 9,130.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,918.52 : 15,054.72 = 9,130.04 : x
2. Step 2: Convert to fraction form
   10,918.52/15,054.72 = 9,130.04/x
3. Step 3: Cross multiply
   10,918.52x = 15,054.72 × 9,130.04
4. Step 4: Simplify right side
   10,918.52x = 137,450,195.79
5. Step 5: Solve for x
   x = 137,450,195.79/10,918.52
6. Step 6: Final answer
   x = 12,588.72