Finding the Fourth Proportional to 12,773.89, 19,161.78 and 5,379.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,773.89 : 19,161.78 = 5,379.13 : x
2. Step 2: Convert to fraction form
   12,773.89/19,161.78 = 5,379.13/x
3. Step 3: Cross multiply
   12,773.89x = 19,161.78 × 5,379.13
4. Step 4: Simplify right side
   12,773.89x = 103,073,705.65
5. Step 5: Solve for x
   x = 103,073,705.65/12,773.89
6. Step 6: Final answer
   x = 8,069.09