Finding the Fourth Proportional to 19,653.50, 29,480.52 and 10,905.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,653.50 : 29,480.52 = 10,905.50 : x
2. Step 2: Convert to fraction form
   19,653.50/29,480.52 = 10,905.50/x
3. Step 3: Cross multiply
   19,653.50x = 29,480.52 × 10,905.50
4. Step 4: Simplify right side
   19,653.50x = 321,499,810.86
5. Step 5: Solve for x
   x = 321,499,810.86/19,653.50
6. Step 6: Final answer
   x = 16,358.40