Finding the Fourth Proportional to 104,915.52, 144,782.78 and 57,168.72

Step by Step Solution

1. Step 1: Write the proportion equation
   104,915.52 : 144,782.78 = 57,168.72 : x
2. Step 2: Convert to fraction form
   104,915.52/144,782.78 = 57,168.72/x
3. Step 3: Cross multiply
   104,915.52x = 144,782.78 × 57,168.72
4. Step 4: Simplify right side
   104,915.52x = 8,277,045,924.80
5. Step 5: Solve for x
   x = 8,277,045,924.80/104,915.52
6. Step 6: Final answer
   x = 78,892.48