Finding the Fourth Proportional to 11,499.28, 15,861.48 and 10,984.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,499.28 : 15,861.48 = 10,984.72 : x
2. Step 2: Convert to fraction form
   11,499.28/15,861.48 = 10,984.72/x
3. Step 3: Cross multiply
   11,499.28x = 15,861.48 × 10,984.72
4. Step 4: Simplify right side
   11,499.28x = 174,233,916.59
5. Step 5: Solve for x
   x = 174,233,916.59/11,499.28
6. Step 6: Final answer
   x = 15,151.72