Finding the Fourth Proportional to 43,009.74, 64,514.52 and 28,215.12

Step by Step Solution

1. Step 1: Write the proportion equation
   43,009.74 : 64,514.52 = 28,215.12 : x
2. Step 2: Convert to fraction form
   43,009.74/64,514.52 = 28,215.12/x
3. Step 3: Cross multiply
   43,009.74x = 64,514.52 × 28,215.12
4. Step 4: Simplify right side
   43,009.74x = 1,820,284,923.54
5. Step 5: Solve for x
   x = 1,820,284,923.54/43,009.74
6. Step 6: Final answer
   x = 42,322.62