Finding the Fourth Proportional to 10,155.08, 14,013.91 and 5,678.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,155.08 : 14,013.91 = 5,678.78 : x
2. Step 2: Convert to fraction form
   10,155.08/14,013.91 = 5,678.78/x
3. Step 3: Cross multiply
   10,155.08x = 14,013.91 × 5,678.78
4. Step 4: Simplify right side
   10,155.08x = 79,581,827.56
5. Step 5: Solve for x
   x = 79,581,827.56/10,155.08
6. Step 6: Final answer
   x = 7,836.66