Finding the Fourth Proportional to 13,285.49, 19,935.05 and 9,128.84

Step by Step Solution

1. Step 1: Write the proportion equation
   13,285.49 : 19,935.05 = 9,128.84 : x
2. Step 2: Convert to fraction form
   13,285.49/19,935.05 = 9,128.84/x
3. Step 3: Cross multiply
   13,285.49x = 19,935.05 × 9,128.84
4. Step 4: Simplify right side
   13,285.49x = 181,983,736.52
5. Step 5: Solve for x
   x = 181,983,736.52/13,285.49
6. Step 6: Final answer
   x = 13,697.94