Finding the Fourth Proportional to 104,428.69, 144,111.72 and 56,682.03

Step by Step Solution

1. Step 1: Write the proportion equation
   104,428.69 : 144,111.72 = 56,682.03 : x
2. Step 2: Convert to fraction form
   104,428.69/144,111.72 = 56,682.03/x
3. Step 3: Cross multiply
   104,428.69x = 144,111.72 × 56,682.03
4. Step 4: Simplify right side
   104,428.69x = 8,168,544,836.39
5. Step 5: Solve for x
   x = 8,168,544,836.39/104,428.69
6. Step 6: Final answer
   x = 78,221.27