Finding the Fourth Proportional to 9,359.98, 12,915.79 and 5,381.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,359.98 : 12,915.79 = 5,381.67 : x
2. Step 2: Convert to fraction form
   9,359.98/12,915.79 = 5,381.67/x
3. Step 3: Cross multiply
   9,359.98x = 12,915.79 × 5,381.67
4. Step 4: Simplify right side
   9,359.98x = 69,508,519.57
5. Step 5: Solve for x
   x = 69,508,519.57/9,359.98
6. Step 6: Final answer
   x = 7,426.14