Finding the Fourth Proportional to 39,231, 58,805.33 and 19,212.89

Step by Step Solution

1. Step 1: Write the proportion equation
   39,231 : 58,805.33 = 19,212.89 : x
2. Step 2: Convert to fraction form
   39,231/58,805.33 = 19,212.89/x
3. Step 3: Cross multiply
   39,231x = 58,805.33 × 19,212.89
4. Step 4: Simplify right side
   39,231x = 1,129,819,946.61
5. Step 5: Solve for x
   x = 1,129,819,946.61/39,231
6. Step 6: Final answer
   x = 28,799.16