Finding the Fourth Proportional to 104,426.83, 144,109.17 and 56,680.15

Step by Step Solution

1. Step 1: Write the proportion equation
   104,426.83 : 144,109.17 = 56,680.15 : x
2. Step 2: Convert to fraction form
   104,426.83/144,109.17 = 56,680.15/x
3. Step 3: Cross multiply
   104,426.83x = 144,109.17 × 56,680.15
4. Step 4: Simplify right side
   104,426.83x = 8,168,129,371.98
5. Step 5: Solve for x
   x = 8,168,129,371.98/104,426.83
6. Step 6: Final answer
   x = 78,218.69