Finding the Fourth Proportional to 10,835.38, 16,158.35 and 9,640.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,835.38 : 16,158.35 = 9,640.72 : x
2. Step 2: Convert to fraction form
   10,835.38/16,158.35 = 9,640.72/x
3. Step 3: Cross multiply
   10,835.38x = 16,158.35 × 9,640.72
4. Step 4: Simplify right side
   10,835.38x = 155,778,128.01
5. Step 5: Solve for x
   x = 155,778,128.01/10,835.38
6. Step 6: Final answer
   x = 14,376.80