Finding the Fourth Proportional to 13,673.42, 18,869.31 and 7,385.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,673.42 : 18,869.31 = 7,385.79 : x
2. Step 2: Convert to fraction form
   13,673.42/18,869.31 = 7,385.79/x
3. Step 3: Cross multiply
   13,673.42x = 18,869.31 × 7,385.79
4. Step 4: Simplify right side
   13,673.42x = 139,364,761.10
5. Step 5: Solve for x
   x = 139,364,761.10/13,673.42
6. Step 6: Final answer
   x = 10,192.39