Finding the Fourth Proportional to 9,379.72, 12,944.10 and 5,188.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.72 : 12,944.10 = 5,188.04 : x
2. Step 2: Convert to fraction form
   9,379.72/12,944.10 = 5,188.04/x
3. Step 3: Cross multiply
   9,379.72x = 12,944.10 × 5,188.04
4. Step 4: Simplify right side
   9,379.72x = 67,154,508.56
5. Step 5: Solve for x
   x = 67,154,508.56/9,379.72
6. Step 6: Final answer
   x = 7,159.54