Finding the Fourth Proportional to 9,238.86, 13,856.47 and 3,315.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,238.86 : 13,856.47 = 3,315.58 : x
2. Step 2: Convert to fraction form
   9,238.86/13,856.47 = 3,315.58/x
3. Step 3: Cross multiply
   9,238.86x = 13,856.47 × 3,315.58
4. Step 4: Simplify right side
   9,238.86x = 45,942,269.82
5. Step 5: Solve for x
   x = 45,942,269.82/9,238.86
6. Step 6: Final answer
   x = 4,972.72