Finding the Fourth Proportional to 28,210.27, 42,322.41 and 19,906.51

Step by Step Solution

1. Step 1: Write the proportion equation
   28,210.27 : 42,322.41 = 19,906.51 : x
2. Step 2: Convert to fraction form
   28,210.27/42,322.41 = 19,906.51/x
3. Step 3: Cross multiply
   28,210.27x = 42,322.41 × 19,906.51
4. Step 4: Simplify right side
   28,210.27x = 842,491,477.89
5. Step 5: Solve for x
   x = 842,491,477.89/28,210.27
6. Step 6: Final answer
   x = 29,864.71