Finding the Fourth Proportional to 9,011.79, 12,436.54 and 5,235.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,011.79 : 12,436.54 = 5,235.57 : x
2. Step 2: Convert to fraction form
   9,011.79/12,436.54 = 5,235.57/x
3. Step 3: Cross multiply
   9,011.79x = 12,436.54 × 5,235.57
4. Step 4: Simplify right side
   9,011.79x = 65,112,362.64
5. Step 5: Solve for x
   x = 65,112,362.64/9,011.79
6. Step 6: Final answer
   x = 7,225.24