Finding the Fourth Proportional to 42,843.98, 64,292.58 and 20,659.64

Step by Step Solution

1. Step 1: Write the proportion equation
   42,843.98 : 64,292.58 = 20,659.64 : x
2. Step 2: Convert to fraction form
   42,843.98/64,292.58 = 20,659.64/x
3. Step 3: Cross multiply
   42,843.98x = 64,292.58 × 20,659.64
4. Step 4: Simplify right side
   42,843.98x = 1,328,261,557.47
5. Step 5: Solve for x
   x = 1,328,261,557.47/42,843.98
6. Step 6: Final answer
   x = 31,002.29