Finding the Fourth Proportional to 9,360.65, 12,919.91 and 5,384.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,360.65 : 12,919.91 = 5,384.07 : x
2. Step 2: Convert to fraction form
   9,360.65/12,919.91 = 5,384.07/x
3. Step 3: Cross multiply
   9,360.65x = 12,919.91 × 5,384.07
4. Step 4: Simplify right side
   9,360.65x = 69,561,672.91
5. Step 5: Solve for x
   x = 69,561,672.91/9,360.65
6. Step 6: Final answer
   x = 7,431.28