Finding the Fourth Proportional to 262,990.59, 362,928.67 and 142,131.59

Step by Step Solution

1. Step 1: Write the proportion equation
   262,990.59 : 362,928.67 = 142,131.59 : x
2. Step 2: Convert to fraction form
   262,990.59/362,928.67 = 142,131.59/x
3. Step 3: Cross multiply
   262,990.59x = 362,928.67 × 142,131.59
4. Step 4: Simplify right side
   262,990.59x = 51,583,628,114.70
5. Step 5: Solve for x
   x = 51,583,628,114.70/262,990.59
6. Step 6: Final answer
   x = 196,142.49