Finding the Fourth Proportional to 142,572.59, 196,718.69 and 85,203.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,572.59 : 196,718.69 = 85,203.31 : x
2. Step 2: Convert to fraction form
   142,572.59/196,718.69 = 85,203.31/x
3. Step 3: Cross multiply
   142,572.59x = 196,718.69 × 85,203.31
4. Step 4: Simplify right side
   142,572.59x = 16,761,082,117.25
5. Step 5: Solve for x
   x = 16,761,082,117.25/142,572.59
6. Step 6: Final answer
   x = 117,561.74