Finding the Fourth Proportional to 104,662.05, 144,434.78 and 56,915.39

Step by Step Solution

1. Step 1: Write the proportion equation
   104,662.05 : 144,434.78 = 56,915.39 : x
2. Step 2: Convert to fraction form
   104,662.05/144,434.78 = 56,915.39/x
3. Step 3: Cross multiply
   104,662.05x = 144,434.78 × 56,915.39
4. Step 4: Simplify right side
   104,662.05x = 8,220,562,155.48
5. Step 5: Solve for x
   x = 8,220,562,155.48/104,662.05
6. Step 6: Final answer
   x = 78,543.87