Finding the Fourth Proportional to 11,970.34, 17,911.76 and 7,042.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,970.34 : 17,911.76 = 7,042.30 : x
2. Step 2: Convert to fraction form
   11,970.34/17,911.76 = 7,042.30/x
3. Step 3: Cross multiply
   11,970.34x = 17,911.76 × 7,042.30
4. Step 4: Simplify right side
   11,970.34x = 126,139,973.48
5. Step 5: Solve for x
   x = 126,139,973.48/11,970.34
6. Step 6: Final answer
   x = 10,537.71