Finding the Fourth Proportional to 104,931.69, 144,805.91 and 57,185.02

Step by Step Solution

1. Step 1: Write the proportion equation
   104,931.69 : 144,805.91 = 57,185.02 : x
2. Step 2: Convert to fraction form
   104,931.69/144,805.91 = 57,185.02/x
3. Step 3: Cross multiply
   104,931.69x = 144,805.91 × 57,185.02
4. Step 4: Simplify right side
   104,931.69x = 8,280,728,859.47
5. Step 5: Solve for x
   x = 8,280,728,859.47/104,931.69
6. Step 6: Final answer
   x = 78,915.42