Finding the Fourth Proportional to 13,008.20, 17,951.30 and 7,039.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,008.20 : 17,951.30 = 7,039.86 : x
2. Step 2: Convert to fraction form
   13,008.20/17,951.30 = 7,039.86/x
3. Step 3: Cross multiply
   13,008.20x = 17,951.30 × 7,039.86
4. Step 4: Simplify right side
   13,008.20x = 126,374,656.42
5. Step 5: Solve for x
   x = 126,374,656.42/13,008.20
6. Step 6: Final answer
   x = 9,715.00