Finding the Fourth Proportional to 12,776.52, 19,172.16 and 5,380.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.52 : 19,172.16 = 5,380.32 : x
2. Step 2: Convert to fraction form
   12,776.52/19,172.16 = 5,380.32/x
3. Step 3: Cross multiply
   12,776.52x = 19,172.16 × 5,380.32
4. Step 4: Simplify right side
   12,776.52x = 103,152,355.89
5. Step 5: Solve for x
   x = 103,152,355.89/12,776.52
6. Step 6: Final answer
   x = 8,073.59