Finding the Fourth Proportional to 9,112.78, 13,674.93 and 5,224.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,112.78 : 13,674.93 = 5,224.78 : x
2. Step 2: Convert to fraction form
   9,112.78/13,674.93 = 5,224.78/x
3. Step 3: Cross multiply
   9,112.78x = 13,674.93 × 5,224.78
4. Step 4: Simplify right side
   9,112.78x = 71,448,500.77
5. Step 5: Solve for x
   x = 71,448,500.77/9,112.78
6. Step 6: Final answer
   x = 7,840.47