Finding the Fourth Proportional to 11,801.72, 16,284.31 and 7,086.11

Step by Step Solution

1. Step 1: Write the proportion equation
   11,801.72 : 16,284.31 = 7,086.11 : x
2. Step 2: Convert to fraction form
   11,801.72/16,284.31 = 7,086.11/x
3. Step 3: Cross multiply
   11,801.72x = 16,284.31 × 7,086.11
4. Step 4: Simplify right side
   11,801.72x = 115,392,312.80
5. Step 5: Solve for x
   x = 115,392,312.80/11,801.72
6. Step 6: Final answer
   x = 9,777.58