Finding the Fourth Proportional to 42,708.64, 64,063.18 and 28,010.63

Step by Step Solution

1. Step 1: Write the proportion equation
   42,708.64 : 64,063.18 = 28,010.63 : x
2. Step 2: Convert to fraction form
   42,708.64/64,063.18 = 28,010.63/x
3. Step 3: Cross multiply
   42,708.64x = 64,063.18 × 28,010.63
4. Step 4: Simplify right side
   42,708.64x = 1,794,449,986.54
5. Step 5: Solve for x
   x = 1,794,449,986.54/42,708.64
6. Step 6: Final answer
   x = 42,016.09