Finding the Fourth Proportional to 9,357.86, 12,914.34 and 5,379.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,357.86 : 12,914.34 = 5,379.35 : x
2. Step 2: Convert to fraction form
   9,357.86/12,914.34 = 5,379.35/x
3. Step 3: Cross multiply
   9,357.86x = 12,914.34 × 5,379.35
4. Step 4: Simplify right side
   9,357.86x = 69,470,670.13
5. Step 5: Solve for x
   x = 69,470,670.13/9,357.86
6. Step 6: Final answer
   x = 7,423.78