Finding the Fourth Proportional to 9,358.07, 12,914.91 and 5,380.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,358.07 : 12,914.91 = 5,380.47 : x
2. Step 2: Convert to fraction form
   9,358.07/12,914.91 = 5,380.47/x
3. Step 3: Cross multiply
   9,358.07x = 12,914.91 × 5,380.47
4. Step 4: Simplify right side
   9,358.07x = 69,488,285.81
5. Step 5: Solve for x
   x = 69,488,285.81/9,358.07
6. Step 6: Final answer
   x = 7,425.50