Finding the Fourth Proportional to 104,535.89, 144,259.71 and 56,789.29

Step by Step Solution

1. Step 1: Write the proportion equation
   104,535.89 : 144,259.71 = 56,789.29 : x
2. Step 2: Convert to fraction form
   104,535.89/144,259.71 = 56,789.29/x
3. Step 3: Cross multiply
   104,535.89x = 144,259.71 × 56,789.29
4. Step 4: Simplify right side
   104,535.89x = 8,192,406,506.51
5. Step 5: Solve for x
   x = 8,192,406,506.51/104,535.89
6. Step 6: Final answer
   x = 78,369.32