Finding the Fourth Proportional to 15,156.69, 20,916.27 and 8,784.52

Step by Step Solution

1. Step 1: Write the proportion equation
   15,156.69 : 20,916.27 = 8,784.52 : x
2. Step 2: Convert to fraction form
   15,156.69/20,916.27 = 8,784.52/x
3. Step 3: Cross multiply
   15,156.69x = 20,916.27 × 8,784.52
4. Step 4: Simplify right side
   15,156.69x = 183,739,339.85
5. Step 5: Solve for x
   x = 183,739,339.85/15,156.69
6. Step 6: Final answer
   x = 12,122.66