Finding the Fourth Proportional to 14,158.28, 19,538.66 and 7,785.15

Step by Step Solution

1. Step 1: Write the proportion equation
   14,158.28 : 19,538.66 = 7,785.15 : x
2. Step 2: Convert to fraction form
   14,158.28/19,538.66 = 7,785.15/x
3. Step 3: Cross multiply
   14,158.28x = 19,538.66 × 7,785.15
4. Step 4: Simplify right side
   14,158.28x = 152,111,345.09
5. Step 5: Solve for x
   x = 152,111,345.09/14,158.28
6. Step 6: Final answer
   x = 10,743.63