Finding the Fourth Proportional to 13,880.16, 19,155.42 and 8,219.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,880.16 : 19,155.42 = 8,219.34 : x
2. Step 2: Convert to fraction form
   13,880.16/19,155.42 = 8,219.34/x
3. Step 3: Cross multiply
   13,880.16x = 19,155.42 × 8,219.34
4. Step 4: Simplify right side
   13,880.16x = 157,444,909.82
5. Step 5: Solve for x
   x = 157,444,909.82/13,880.16
6. Step 6: Final answer
   x = 11,343.16