Finding the Fourth Proportional to 9,011.72, 12,429.31 and 7,754.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,011.72 : 12,429.31 = 7,754.87 : x
2. Step 2: Convert to fraction form
   9,011.72/12,429.31 = 7,754.87/x
3. Step 3: Cross multiply
   9,011.72x = 12,429.31 × 7,754.87
4. Step 4: Simplify right side
   9,011.72x = 96,387,683.24
5. Step 5: Solve for x
   x = 96,387,683.24/9,011.72
6. Step 6: Final answer
   x = 10,695.81