Finding the Fourth Proportional to 9,379.92, 12,944.34 and 5,188.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.92 : 12,944.34 = 5,188.17 : x
2. Step 2: Convert to fraction form
   9,379.92/12,944.34 = 5,188.17/x
3. Step 3: Cross multiply
   9,379.92x = 12,944.34 × 5,188.17
4. Step 4: Simplify right side
   9,379.92x = 67,157,436.46
5. Step 5: Solve for x
   x = 67,157,436.46/9,379.92
6. Step 6: Final answer
   x = 7,159.70