Finding the Fourth Proportional to 12,827.50, 17,703.60 and 7,238.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,827.50 : 17,703.60 = 7,238.50 : x
2. Step 2: Convert to fraction form
   12,827.50/17,703.60 = 7,238.50/x
3. Step 3: Cross multiply
   12,827.50x = 17,703.60 × 7,238.50
4. Step 4: Simplify right side
   12,827.50x = 128,147,508.60
5. Step 5: Solve for x
   x = 128,147,508.60/12,827.50
6. Step 6: Final answer
   x = 9,990.06