Finding the Fourth Proportional to 261,814.50, 361,304.01 and 142,582.50

Step by Step Solution

1. Step 1: Write the proportion equation
   261,814.50 : 361,304.01 = 142,582.50 : x
2. Step 2: Convert to fraction form
   261,814.50/361,304.01 = 142,582.50/x
3. Step 3: Cross multiply
   261,814.50x = 361,304.01 × 142,582.50
4. Step 4: Simplify right side
   261,814.50x = 51,515,629,005.83
5. Step 5: Solve for x
   x = 51,515,629,005.83/261,814.50
6. Step 6: Final answer
   x = 196,763.85