Finding the Fourth Proportional to 9,012.39, 12,436.11 and 5,235.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,012.39 : 12,436.11 = 5,235.63 : x
2. Step 2: Convert to fraction form
   9,012.39/12,436.11 = 5,235.63/x
3. Step 3: Cross multiply
   9,012.39x = 12,436.11 × 5,235.63
4. Step 4: Simplify right side
   9,012.39x = 65,110,870.60
5. Step 5: Solve for x
   x = 65,110,870.60/9,012.39
6. Step 6: Final answer
   x = 7,224.60