Finding the Fourth Proportional to 12,687.86, 19,030.42 and 3,328.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687.86 : 19,030.42 = 3,328.82 : x
2. Step 2: Convert to fraction form
   12,687.86/19,030.42 = 3,328.82/x
3. Step 3: Cross multiply
   12,687.86x = 19,030.42 × 3,328.82
4. Step 4: Simplify right side
   12,687.86x = 63,348,730.91
5. Step 5: Solve for x
   x = 63,348,730.91/12,687.86
6. Step 6: Final answer
   x = 4,992.86