Finding the Fourth Proportional to 36,920.72, 55,379.64 and 12,296.72

Step by Step Solution

1. Step 1: Write the proportion equation
   36,920.72 : 55,379.64 = 12,296.72 : x
2. Step 2: Convert to fraction form
   36,920.72/55,379.64 = 12,296.72/x
3. Step 3: Cross multiply
   36,920.72x = 55,379.64 × 12,296.72
4. Step 4: Simplify right side
   36,920.72x = 680,987,926.78
5. Step 5: Solve for x
   x = 680,987,926.78/36,920.72
6. Step 6: Final answer
   x = 18,444.60