Finding the Fourth Proportional to 12,683.86, 17,504.82 and 7,378.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,683.86 : 17,504.82 = 7,378.31 : x
2. Step 2: Convert to fraction form
   12,683.86/17,504.82 = 7,378.31/x
3. Step 3: Cross multiply
   12,683.86x = 17,504.82 × 7,378.31
4. Step 4: Simplify right side
   12,683.86x = 129,156,032.22
5. Step 5: Solve for x
   x = 129,156,032.22/12,683.86
6. Step 6: Final answer
   x = 10,182.71