Finding the Fourth Proportional to 142,570.17, 196,733.51 and 85,198.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,570.17 : 196,733.51 = 85,198.10 : x
2. Step 2: Convert to fraction form
   142,570.17/196,733.51 = 85,198.10/x
3. Step 3: Cross multiply
   142,570.17x = 196,733.51 × 85,198.10
4. Step 4: Simplify right side
   142,570.17x = 16,761,321,324.17
5. Step 5: Solve for x
   x = 16,761,321,324.17/142,570.17
6. Step 6: Final answer
   x = 117,565.42