Finding the Fourth Proportional to 12,189.63, 18,280.71 and 5,169.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,189.63 : 18,280.71 = 5,169.52 : x
2. Step 2: Convert to fraction form
   12,189.63/18,280.71 = 5,169.52/x
3. Step 3: Cross multiply
   12,189.63x = 18,280.71 × 5,169.52
4. Step 4: Simplify right side
   12,189.63x = 94,502,495.96
5. Step 5: Solve for x
   x = 94,502,495.96/12,189.63
6. Step 6: Final answer
   x = 7,752.70