Finding the Fourth Proportional to 12,209.92, 18,300.52 and 5,185.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,209.92 : 18,300.52 = 5,185.55 : x
2. Step 2: Convert to fraction form
   12,209.92/18,300.52 = 5,185.55/x
3. Step 3: Cross multiply
   12,209.92x = 18,300.52 × 5,185.55
4. Step 4: Simplify right side
   12,209.92x = 94,898,225.36
5. Step 5: Solve for x
   x = 94,898,225.36/12,209.92
6. Step 6: Final answer
   x = 7,772.22