Finding the Fourth Proportional to 12,902.31, 19,356.72 and 3,668.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,902.31 : 19,356.72 = 3,668.31 : x
2. Step 2: Convert to fraction form
   12,902.31/19,356.72 = 3,668.31/x
3. Step 3: Cross multiply
   12,902.31x = 19,356.72 × 3,668.31
4. Step 4: Simplify right side
   12,902.31x = 71,006,497.94
5. Step 5: Solve for x
   x = 71,006,497.94/12,902.31
6. Step 6: Final answer
   x = 5,503.39