Finding the Fourth Proportional to 9,139.42, 13,760.57 and 8,333.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.42 : 13,760.57 = 8,333.88 : x
2. Step 2: Convert to fraction form
   9,139.42/13,760.57 = 8,333.88/x
3. Step 3: Cross multiply
   9,139.42x = 13,760.57 × 8,333.88
4. Step 4: Simplify right side
   9,139.42x = 114,678,939.11
5. Step 5: Solve for x
   x = 114,678,939.11/9,139.42
6. Step 6: Final answer
   x = 12,547.73