Finding the Fourth Proportional to 104,426.49, 144,108.72 and 56,679.86

Step by Step Solution

1. Step 1: Write the proportion equation
   104,426.49 : 144,108.72 = 56,679.86 : x
2. Step 2: Convert to fraction form
   104,426.49/144,108.72 = 56,679.86/x
3. Step 3: Cross multiply
   104,426.49x = 144,108.72 × 56,679.86
4. Step 4: Simplify right side
   104,426.49x = 8,168,061,353.84
5. Step 5: Solve for x
   x = 8,168,061,353.84/104,426.49
6. Step 6: Final answer
   x = 78,218.29