Finding the Fourth Proportional to 9,317.88, 13,978.24 and 3,078.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,317.88 : 13,978.24 = 3,078.55 : x
2. Step 2: Convert to fraction form
   9,317.88/13,978.24 = 3,078.55/x
3. Step 3: Cross multiply
   9,317.88x = 13,978.24 × 3,078.55
4. Step 4: Simplify right side
   9,317.88x = 43,032,720.53
5. Step 5: Solve for x
   x = 43,032,720.53/9,317.88
6. Step 6: Final answer
   x = 4,618.30