Finding the Fourth Proportional to 13,011.05, 17,955.30 and 7,042.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,011.05 : 17,955.30 = 7,042.71 : x
2. Step 2: Convert to fraction form
   13,011.05/17,955.30 = 7,042.71/x
3. Step 3: Cross multiply
   13,011.05x = 17,955.30 × 7,042.71
4. Step 4: Simplify right side
   13,011.05x = 126,453,970.86
5. Step 5: Solve for x
   x = 126,453,970.86/13,011.05
6. Step 6: Final answer
   x = 9,718.97