Finding the Fourth Proportional to 10,055.31, 13,876.20 and 5,578.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,055.31 : 13,876.20 = 5,578.94 : x
2. Step 2: Convert to fraction form
   10,055.31/13,876.20 = 5,578.94/x
3. Step 3: Cross multiply
   10,055.31x = 13,876.20 × 5,578.94
4. Step 4: Simplify right side
   10,055.31x = 77,414,417.85
5. Step 5: Solve for x
   x = 77,414,417.85/10,055.31
6. Step 6: Final answer
   x = 7,698.86