Finding the Fourth Proportional to 31,007.21, 42,788.25 and 19,066.19

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.21 : 42,788.25 = 19,066.19 : x
2. Step 2: Convert to fraction form
   31,007.21/42,788.25 = 19,066.19/x
3. Step 3: Cross multiply
   31,007.21x = 42,788.25 × 19,066.19
4. Step 4: Simplify right side
   31,007.21x = 815,808,690.33
5. Step 5: Solve for x
   x = 815,808,690.33/31,007.21
6. Step 6: Final answer
   x = 26,310.29