Finding the Fourth Proportional to 261,715, 361,166.72 and 142,483

Step by Step Solution

1. Step 1: Write the proportion equation
   261,715 : 361,166.72 = 142,483 : x
2. Step 2: Convert to fraction form
   261,715/361,166.72 = 142,483/x
3. Step 3: Cross multiply
   261,715x = 361,166.72 × 142,483
4. Step 4: Simplify right side
   261,715x = 51,460,117,765.76
5. Step 5: Solve for x
   x = 51,460,117,765.76/261,715
6. Step 6: Final answer
   x = 196,626.55