Finding the Fourth Proportional to 12,903.33, 17,806.73 and 7,238.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,903.33 : 17,806.73 = 7,238.28 : x
2. Step 2: Convert to fraction form
   12,903.33/17,806.73 = 7,238.28/x
3. Step 3: Cross multiply
   12,903.33x = 17,806.73 × 7,238.28
4. Step 4: Simplify right side
   12,903.33x = 128,890,097.62
5. Step 5: Solve for x
   x = 128,890,097.62/12,903.33
6. Step 6: Final answer
   x = 9,988.90