Finding the Fourth Proportional to 142,140, 196,159.52 and 81,730.24

Step by Step Solution

1. Step 1: Write the proportion equation
   142,140 : 196,159.52 = 81,730.24 : x
2. Step 2: Convert to fraction form
   142,140/196,159.52 = 81,730.24/x
3. Step 3: Cross multiply
   142,140x = 196,159.52 × 81,730.24
4. Step 4: Simplify right side
   142,140x = 16,032,164,647.88
5. Step 5: Solve for x
   x = 16,032,164,647.88/142,140
6. Step 6: Final answer
   x = 112,791.37