Finding the Fourth Proportional to 12,904.92, 17,804.48 and 7,238.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904.92 : 17,804.48 = 7,238.70 : x
2. Step 2: Convert to fraction form
   12,904.92/17,804.48 = 7,238.70/x
3. Step 3: Cross multiply
   12,904.92x = 17,804.48 × 7,238.70
4. Step 4: Simplify right side
   12,904.92x = 128,881,253.18
5. Step 5: Solve for x
   x = 128,881,253.18/12,904.92
6. Step 6: Final answer
   x = 9,986.99