Finding the Fourth Proportional to 14,391.20, 19,848.61 and 9,357.05

Step by Step Solution

1. Step 1: Write the proportion equation
   14,391.20 : 19,848.61 = 9,357.05 : x
2. Step 2: Convert to fraction form
   14,391.20/19,848.61 = 9,357.05/x
3. Step 3: Cross multiply
   14,391.20x = 19,848.61 × 9,357.05
4. Step 4: Simplify right side
   14,391.20x = 185,724,497.52
5. Step 5: Solve for x
   x = 185,724,497.52/14,391.20
6. Step 6: Final answer
   x = 12,905.42