Finding the Fourth Proportional to 10,691.56, 14,739.78 and 7,903.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,691.56 : 14,739.78 = 7,903.72 : x
2. Step 2: Convert to fraction form
   10,691.56/14,739.78 = 7,903.72/x
3. Step 3: Cross multiply
   10,691.56x = 14,739.78 × 7,903.72
4. Step 4: Simplify right side
   10,691.56x = 116,499,093.98
5. Step 5: Solve for x
   x = 116,499,093.98/10,691.56
6. Step 6: Final answer
   x = 10,896.36