Finding the Fourth Proportional to 10,326.78, 15,480.90 and 5,058.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,326.78 : 15,480.90 = 5,058.78 : x
2. Step 2: Convert to fraction form
   10,326.78/15,480.90 = 5,058.78/x
3. Step 3: Cross multiply
   10,326.78x = 15,480.90 × 5,058.78
4. Step 4: Simplify right side
   10,326.78x = 78,314,467.30
5. Step 5: Solve for x
   x = 78,314,467.30/10,326.78
6. Step 6: Final answer
   x = 7,583.63