Finding the Fourth Proportional to 9,368.10, 12,930.18 and 5,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,368.10 : 12,930.18 = 5,391.50 : x
2. Step 2: Convert to fraction form
   9,368.10/12,930.18 = 5,391.50/x
3. Step 3: Cross multiply
   9,368.10x = 12,930.18 × 5,391.50
4. Step 4: Simplify right side
   9,368.10x = 69,713,065.47
5. Step 5: Solve for x
   x = 69,713,065.47/9,368.10
6. Step 6: Final answer
   x = 7,441.54