Finding the Fourth Proportional to 12,904.74, 17,807.52 and 7,238.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904.74 : 17,807.52 = 7,238.73 : x
2. Step 2: Convert to fraction form
   12,904.74/17,807.52 = 7,238.73/x
3. Step 3: Cross multiply
   12,904.74x = 17,807.52 × 7,238.73
4. Step 4: Simplify right side
   12,904.74x = 128,903,829.25
5. Step 5: Solve for x
   x = 128,903,829.25/12,904.74
6. Step 6: Final answer
   x = 9,988.87