Finding the Fourth Proportional to 10,105.83, 15,153.54 and 5,429.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,105.83 : 15,153.54 = 5,429.78 : x
2. Step 2: Convert to fraction form
   10,105.83/15,153.54 = 5,429.78/x
3. Step 3: Cross multiply
   10,105.83x = 15,153.54 × 5,429.78
4. Step 4: Simplify right side
   10,105.83x = 82,280,312.65
5. Step 5: Solve for x
   x = 82,280,312.65/10,105.83
6. Step 6: Final answer
   x = 8,141.87