Finding the Fourth Proportional to 9,119.48, 13,680.72 and 2,878.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,119.48 : 13,680.72 = 2,878.02 : x
2. Step 2: Convert to fraction form
   9,119.48/13,680.72 = 2,878.02/x
3. Step 3: Cross multiply
   9,119.48x = 13,680.72 × 2,878.02
4. Step 4: Simplify right side
   9,119.48x = 39,373,385.77
5. Step 5: Solve for x
   x = 39,373,385.77/9,119.48
6. Step 6: Final answer
   x = 4,317.51