Finding the Fourth Proportional to 12,895.07, 19,328.90 and 8,200.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,895.07 : 19,328.90 = 8,200.31 : x
2. Step 2: Convert to fraction form
   12,895.07/19,328.90 = 8,200.31/x
3. Step 3: Cross multiply
   12,895.07x = 19,328.90 × 8,200.31
4. Step 4: Simplify right side
   12,895.07x = 158,502,834.31
5. Step 5: Solve for x
   x = 158,502,834.31/12,895.07
6. Step 6: Final answer
   x = 12,291.74