Finding the Fourth Proportional to 10,768.60, 16,128.06 and 9,345.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,768.60 : 16,128.06 = 9,345.16 : x
2. Step 2: Convert to fraction form
   10,768.60/16,128.06 = 9,345.16/x
3. Step 3: Cross multiply
   10,768.60x = 16,128.06 × 9,345.16
4. Step 4: Simplify right side
   10,768.60x = 150,719,301.19
5. Step 5: Solve for x
   x = 150,719,301.19/10,768.60
6. Step 6: Final answer
   x = 13,996.18