Finding the Fourth Proportional to 69,111.78, 103,648.36 and 19,179.99

Step by Step Solution

1. Step 1: Write the proportion equation
   69,111.78 : 103,648.36 = 19,179.99 : x
2. Step 2: Convert to fraction form
   69,111.78/103,648.36 = 19,179.99/x
3. Step 3: Cross multiply
   69,111.78x = 103,648.36 × 19,179.99
4. Step 4: Simplify right side
   69,111.78x = 1,987,974,496.33
5. Step 5: Solve for x
   x = 1,987,974,496.33/69,111.78
6. Step 6: Final answer
   x = 28,764.63