Finding the Fourth Proportional to 10,704.31, 14,738.38 and 9,720.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,704.31 : 14,738.38 = 9,720.16 : x
2. Step 2: Convert to fraction form
   10,704.31/14,738.38 = 9,720.16/x
3. Step 3: Cross multiply
   10,704.31x = 14,738.38 × 9,720.16
4. Step 4: Simplify right side
   10,704.31x = 143,259,350.59
5. Step 5: Solve for x
   x = 143,259,350.59/10,704.31
6. Step 6: Final answer
   x = 13,383.34