Finding the Fourth Proportional to 39,111.96, 58,662 and 12,816.12

Step by Step Solution

1. Step 1: Write the proportion equation
   39,111.96 : 58,662 = 12,816.12 : x
2. Step 2: Convert to fraction form
   39,111.96/58,662 = 12,816.12/x
3. Step 3: Cross multiply
   39,111.96x = 58,662 × 12,816.12
4. Step 4: Simplify right side
   39,111.96x = 751,819,231.44
5. Step 5: Solve for x
   x = 751,819,231.44/39,111.96
6. Step 6: Final answer
   x = 19,222.23