Finding the Fourth Proportional to 9,078.49, 13,619.45 and 3,155.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,078.49 : 13,619.45 = 3,155.15 : x
2. Step 2: Convert to fraction form
   9,078.49/13,619.45 = 3,155.15/x
3. Step 3: Cross multiply
   9,078.49x = 13,619.45 × 3,155.15
4. Step 4: Simplify right side
   9,078.49x = 42,971,407.67
5. Step 5: Solve for x
   x = 42,971,407.67/9,078.49
6. Step 6: Final answer
   x = 4,733.32