Finding the Fourth Proportional to 12,287.10, 18,426.42 and 3,964.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,287.10 : 18,426.42 = 3,964.98 : x
2. Step 2: Convert to fraction form
   12,287.10/18,426.42 = 3,964.98/x
3. Step 3: Cross multiply
   12,287.10x = 18,426.42 × 3,964.98
4. Step 4: Simplify right side
   12,287.10x = 73,060,386.77
5. Step 5: Solve for x
   x = 73,060,386.77/12,287.10
6. Step 6: Final answer
   x = 5,946.11