Finding the Fourth Proportional to 42,704.39, 64,095.96 and 21,659.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,704.39 : 64,095.96 = 21,659.20 : x
2. Step 2: Convert to fraction form
   42,704.39/64,095.96 = 21,659.20/x
3. Step 3: Cross multiply
   42,704.39x = 64,095.96 × 21,659.20
4. Step 4: Simplify right side
   42,704.39x = 1,388,267,216.83
5. Step 5: Solve for x
   x = 1,388,267,216.83/42,704.39
6. Step 6: Final answer
   x = 32,508.77