Finding the Fourth Proportional to 12,314.18, 18,472.29 and 3,990.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,314.18 : 18,472.29 = 3,990.93 : x
2. Step 2: Convert to fraction form
   12,314.18/18,472.29 = 3,990.93/x
3. Step 3: Cross multiply
   12,314.18x = 18,472.29 × 3,990.93
4. Step 4: Simplify right side
   12,314.18x = 73,721,678.81
5. Step 5: Solve for x
   x = 73,721,678.81/12,314.18
6. Step 6: Final answer
   x = 5,986.73