Finding the Fourth Proportional to 9,389.98, 12,957.98 and 5,140.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.98 : 12,957.98 = 5,140.82 : x
2. Step 2: Convert to fraction form
   9,389.98/12,957.98 = 5,140.82/x
3. Step 3: Cross multiply
   9,389.98x = 12,957.98 × 5,140.82
4. Step 4: Simplify right side
   9,389.98x = 66,614,576.55
5. Step 5: Solve for x
   x = 66,614,576.55/9,389.98
6. Step 6: Final answer
   x = 7,094.22