Finding the Fourth Proportional to 9,368.70, 12,930.09 and 5,389.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,368.70 : 12,930.09 = 5,389.71 : x
2. Step 2: Convert to fraction form
   9,368.70/12,930.09 = 5,389.71/x
3. Step 3: Cross multiply
   9,368.70x = 12,930.09 × 5,389.71
4. Step 4: Simplify right side
   9,368.70x = 69,689,435.37
5. Step 5: Solve for x
   x = 69,689,435.37/9,368.70
6. Step 6: Final answer
   x = 7,438.54