Finding the Fourth Proportional to 144,815.31, 199,868.31 and 84,421.31

Step by Step Solution

1. Step 1: Write the proportion equation
   144,815.31 : 199,868.31 = 84,421.31 : x
2. Step 2: Convert to fraction form
   144,815.31/199,868.31 = 84,421.31/x
3. Step 3: Cross multiply
   144,815.31x = 199,868.31 × 84,421.31
4. Step 4: Simplify right side
   144,815.31x = 16,873,143,558.34
5. Step 5: Solve for x
   x = 16,873,143,558.34/144,815.31
6. Step 6: Final answer
   x = 116,514.92