Finding the Fourth Proportional to 9,689.72, 13,373.89 and 5,912.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,689.72 : 13,373.89 = 5,912.07 : x
2. Step 2: Convert to fraction form
   9,689.72/13,373.89 = 5,912.07/x
3. Step 3: Cross multiply
   9,689.72x = 13,373.89 × 5,912.07
4. Step 4: Simplify right side
   9,689.72x = 79,067,417.40
5. Step 5: Solve for x
   x = 79,067,417.40/9,689.72
6. Step 6: Final answer
   x = 8,159.93