Finding the Fourth Proportional to 261,967.50, 361,515.15 and 142,735.50

Step by Step Solution

1. Step 1: Write the proportion equation
   261,967.50 : 361,515.15 = 142,735.50 : x
2. Step 2: Convert to fraction form
   261,967.50/361,515.15 = 142,735.50/x
3. Step 3: Cross multiply
   261,967.50x = 361,515.15 × 142,735.50
4. Step 4: Simplify right side
   261,967.50x = 51,601,045,692.83
5. Step 5: Solve for x
   x = 51,601,045,692.83/261,967.50
6. Step 6: Final answer
   x = 196,974.99