Finding the Fourth Proportional to 9,233.78, 12,739.61 and 5,457.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,233.78 : 12,739.61 = 5,457.05 : x
2. Step 2: Convert to fraction form
   9,233.78/12,739.61 = 5,457.05/x
3. Step 3: Cross multiply
   9,233.78x = 12,739.61 × 5,457.05
4. Step 4: Simplify right side
   9,233.78x = 69,520,661.47
5. Step 5: Solve for x
   x = 69,520,661.47/9,233.78
6. Step 6: Final answer
   x = 7,528.95