Finding the Fourth Proportional to 9,418.56, 12,987.54 and 5,880.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,418.56 : 12,987.54 = 5,880.84 : x
2. Step 2: Convert to fraction form
   9,418.56/12,987.54 = 5,880.84/x
3. Step 3: Cross multiply
   9,418.56x = 12,987.54 × 5,880.84
4. Step 4: Simplify right side
   9,418.56x = 76,377,644.73
5. Step 5: Solve for x
   x = 76,377,644.73/9,418.56
6. Step 6: Final answer
   x = 8,109.27