Finding the Fourth Proportional to 13,011.89, 17,956.42 and 7,043.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,011.89 : 17,956.42 = 7,043.61 : x
2. Step 2: Convert to fraction form
   13,011.89/17,956.42 = 7,043.61/x
3. Step 3: Cross multiply
   13,011.89x = 17,956.42 × 7,043.61
4. Step 4: Simplify right side
   13,011.89x = 126,477,968.20
5. Step 5: Solve for x
   x = 126,477,968.20/13,011.89
6. Step 6: Final answer
   x = 9,720.18