Finding the Fourth Proportional to 13,359.86, 18,434.94 and 7,390.70

Step by Step Solution

1. Step 1: Write the proportion equation
   13,359.86 : 18,434.94 = 7,390.70 : x
2. Step 2: Convert to fraction form
   13,359.86/18,434.94 = 7,390.70/x
3. Step 3: Cross multiply
   13,359.86x = 18,434.94 × 7,390.70
4. Step 4: Simplify right side
   13,359.86x = 136,247,111.06
5. Step 5: Solve for x
   x = 136,247,111.06/13,359.86
6. Step 6: Final answer
   x = 10,198.24