Finding the Fourth Proportional to 11,801.96, 17,691.42 and 8,061.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,801.96 : 17,691.42 = 8,061.80 : x
2. Step 2: Convert to fraction form
   11,801.96/17,691.42 = 8,061.80/x
3. Step 3: Cross multiply
   11,801.96x = 17,691.42 × 8,061.80
4. Step 4: Simplify right side
   11,801.96x = 142,624,689.76
5. Step 5: Solve for x
   x = 142,624,689.76/11,801.96
6. Step 6: Final answer
   x = 12,084.83