Finding the Fourth Proportional to 52,172.97, 78,270.78 and 17,111.31

Step by Step Solution

1. Step 1: Write the proportion equation
   52,172.97 : 78,270.78 = 17,111.31 : x
2. Step 2: Convert to fraction form
   52,172.97/78,270.78 = 17,111.31/x
3. Step 3: Cross multiply
   52,172.97x = 78,270.78 × 17,111.31
4. Step 4: Simplify right side
   52,172.97x = 1,339,315,580.52
5. Step 5: Solve for x
   x = 1,339,315,580.52/52,172.97
6. Step 6: Final answer
   x = 25,670.68