Finding the Fourth Proportional to 13,007.86, 17,950.72 and 7,039.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,007.86 : 17,950.72 = 7,039.40 : x
2. Step 2: Convert to fraction form
   13,007.86/17,950.72 = 7,039.40/x
3. Step 3: Cross multiply
   13,007.86x = 17,950.72 × 7,039.40
4. Step 4: Simplify right side
   13,007.86x = 126,362,298.37
5. Step 5: Solve for x
   x = 126,362,298.37/13,007.86
6. Step 6: Final answer
   x = 9,714.30