Finding the Fourth Proportional to 16,558.47, 22,835.54 and 12,320.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,558.47 : 22,835.54 = 12,320.15 : x
2. Step 2: Convert to fraction form
   16,558.47/22,835.54 = 12,320.15/x
3. Step 3: Cross multiply
   16,558.47x = 22,835.54 × 12,320.15
4. Step 4: Simplify right side
   16,558.47x = 281,337,194.75
5. Step 5: Solve for x
   x = 281,337,194.75/16,558.47
6. Step 6: Final answer
   x = 16,990.53