Finding the Fourth Proportional to 39,284.69, 54,211.83 and 21,379.31

Step by Step Solution

1. Step 1: Write the proportion equation
   39,284.69 : 54,211.83 = 21,379.31 : x
2. Step 2: Convert to fraction form
   39,284.69/54,211.83 = 21,379.31/x
3. Step 3: Cross multiply
   39,284.69x = 54,211.83 × 21,379.31
4. Step 4: Simplify right side
   39,284.69x = 1,159,011,708.22
5. Step 5: Solve for x
   x = 1,159,011,708.22/39,284.69
6. Step 6: Final answer
   x = 29,502.88