Finding the Fourth Proportional to 9,072.79, 13,610.78 and 4,142.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,072.79 : 13,610.78 = 4,142.93 : x
2. Step 2: Convert to fraction form
   9,072.79/13,610.78 = 4,142.93/x
3. Step 3: Cross multiply
   9,072.79x = 13,610.78 × 4,142.93
4. Step 4: Simplify right side
   9,072.79x = 56,388,451.09
5. Step 5: Solve for x
   x = 56,388,451.09/9,072.79
6. Step 6: Final answer
   x = 6,215.12