Finding the Fourth Proportional to 13,341.91, 18,411.32 and 7,678.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,341.91 : 18,411.32 = 7,678.48 : x
2. Step 2: Convert to fraction form
   13,341.91/18,411.32 = 7,678.48/x
3. Step 3: Cross multiply
   13,341.91x = 18,411.32 × 7,678.48
4. Step 4: Simplify right side
   13,341.91x = 141,370,952.39
5. Step 5: Solve for x
   x = 141,370,952.39/13,341.91
6. Step 6: Final answer
   x = 10,596.01