Finding the Fourth Proportional to 42,827.71, 64,214.16 and 20,596.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,827.71 : 64,214.16 = 20,596.81 : x
2. Step 2: Convert to fraction form
   42,827.71/64,214.16 = 20,596.81/x
3. Step 3: Cross multiply
   42,827.71x = 64,214.16 × 20,596.81
4. Step 4: Simplify right side
   42,827.71x = 1,322,606,852.83
5. Step 5: Solve for x
   x = 1,322,606,852.83/42,827.71
6. Step 6: Final answer
   x = 30,882.04