Finding the Fourth Proportional to 11,426.52, 15,784.56 and 10,828.02

Step by Step Solution

1. Step 1: Write the proportion equation
   11,426.52 : 15,784.56 = 10,828.02 : x
2. Step 2: Convert to fraction form
   11,426.52/15,784.56 = 10,828.02/x
3. Step 3: Cross multiply
   11,426.52x = 15,784.56 × 10,828.02
4. Step 4: Simplify right side
   11,426.52x = 170,915,531.37
5. Step 5: Solve for x
   x = 170,915,531.37/11,426.52
6. Step 6: Final answer
   x = 14,957.79