Finding the Fourth Proportional to 9,238.66, 12,748.64 and 5,258.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,238.66 : 12,748.64 = 5,258.98 : x
2. Step 2: Convert to fraction form
   9,238.66/12,748.64 = 5,258.98/x
3. Step 3: Cross multiply
   9,238.66x = 12,748.64 × 5,258.98
4. Step 4: Simplify right side
   9,238.66x = 67,044,790.30
5. Step 5: Solve for x
   x = 67,044,790.30/9,238.66
6. Step 6: Final answer
   x = 7,256.98