Finding the Fourth Proportional to 12,654.46, 18,980.94 and 3,889.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,654.46 : 18,980.94 = 3,889.31 : x
2. Step 2: Convert to fraction form
   12,654.46/18,980.94 = 3,889.31/x
3. Step 3: Cross multiply
   12,654.46x = 18,980.94 × 3,889.31
4. Step 4: Simplify right side
   12,654.46x = 73,822,759.75
5. Step 5: Solve for x
   x = 73,822,759.75/12,654.46
6. Step 6: Final answer
   x = 5,833.74