Finding the Fourth Proportional to 55,326.71, 82,969.72 and 19,778.42

Step by Step Solution

1. Step 1: Write the proportion equation
   55,326.71 : 82,969.72 = 19,778.42 : x
2. Step 2: Convert to fraction form
   55,326.71/82,969.72 = 19,778.42/x
3. Step 3: Cross multiply
   55,326.71x = 82,969.72 × 19,778.42
4. Step 4: Simplify right side
   55,326.71x = 1,641,010,127.42
5. Step 5: Solve for x
   x = 1,641,010,127.42/55,326.71
6. Step 6: Final answer
   x = 29,660.36