Finding the Fourth Proportional to 13,003.86, 17,945.32 and 7,339.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,003.86 : 17,945.32 = 7,339.80 : x
2. Step 2: Convert to fraction form
   13,003.86/17,945.32 = 7,339.80/x
3. Step 3: Cross multiply
   13,003.86x = 17,945.32 × 7,339.80
4. Step 4: Simplify right side
   13,003.86x = 131,715,041.39
5. Step 5: Solve for x
   x = 131,715,041.39/13,003.86
6. Step 6: Final answer
   x = 10,128.92