Finding the Fourth Proportional to 42,727.71, 64,131.77 and 21,682.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,727.71 : 64,131.77 = 21,682.86 : x
2. Step 2: Convert to fraction form
   42,727.71/64,131.77 = 21,682.86/x
3. Step 3: Cross multiply
   42,727.71x = 64,131.77 × 21,682.86
4. Step 4: Simplify right side
   42,727.71x = 1,390,559,761.39
5. Step 5: Solve for x
   x = 1,390,559,761.39/42,727.71
6. Step 6: Final answer
   x = 32,544.69