Finding the Fourth Proportional to 12,772.86, 19,164.72 and 5,378.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,772.86 : 19,164.72 = 5,378.94 : x
2. Step 2: Convert to fraction form
   12,772.86/19,164.72 = 5,378.94/x
3. Step 3: Cross multiply
   12,772.86x = 19,164.72 × 5,378.94
4. Step 4: Simplify right side
   12,772.86x = 103,085,879.00
5. Step 5: Solve for x
   x = 103,085,879.00/12,772.86
6. Step 6: Final answer
   x = 8,070.70