Finding the Fourth Proportional to 14,168.60, 19,551.89 and 7,880.57

Step by Step Solution

1. Step 1: Write the proportion equation
   14,168.60 : 19,551.89 = 7,880.57 : x
2. Step 2: Convert to fraction form
   14,168.60/19,551.89 = 7,880.57/x
3. Step 3: Cross multiply
   14,168.60x = 19,551.89 × 7,880.57
4. Step 4: Simplify right side
   14,168.60x = 154,079,998.37
5. Step 5: Solve for x
   x = 154,079,998.37/14,168.60
6. Step 6: Final answer
   x = 10,874.75