Finding the Fourth Proportional to 144,555.05, 199,488.32 and 79,142.78

Step by Step Solution

1. Step 1: Write the proportion equation
   144,555.05 : 199,488.32 = 79,142.78 : x
2. Step 2: Convert to fraction form
   144,555.05/199,488.32 = 79,142.78/x
3. Step 3: Cross multiply
   144,555.05x = 199,488.32 × 79,142.78
4. Step 4: Simplify right side
   144,555.05x = 15,788,058,829.17
5. Step 5: Solve for x
   x = 15,788,058,829.17/144,555.05
6. Step 6: Final answer
   x = 109,218.32