Finding the Fourth Proportional to 142,120.98, 196,141.40 and 81,694.17

Step by Step Solution

1. Step 1: Write the proportion equation
   142,120.98 : 196,141.40 = 81,694.17 : x
2. Step 2: Convert to fraction form
   142,120.98/196,141.40 = 81,694.17/x
3. Step 3: Cross multiply
   142,120.98x = 196,141.40 × 81,694.17
4. Step 4: Simplify right side
   142,120.98x = 16,023,608,773.52
5. Step 5: Solve for x
   x = 16,023,608,773.52/142,120.98
6. Step 6: Final answer
   x = 112,746.26