Finding the Fourth Proportional to 43,357.30, 65,016.51 and 19,990.42

Step by Step Solution

1. Step 1: Write the proportion equation
   43,357.30 : 65,016.51 = 19,990.42 : x
2. Step 2: Convert to fraction form
   43,357.30/65,016.51 = 19,990.42/x
3. Step 3: Cross multiply
   43,357.30x = 65,016.51 × 19,990.42
4. Step 4: Simplify right side
   43,357.30x = 1,299,707,341.83
5. Step 5: Solve for x
   x = 1,299,707,341.83/43,357.30
6. Step 6: Final answer
   x = 29,976.67