Finding the Fourth Proportional to 142,543.10, 196,696.12 and 85,171

Step by Step Solution

1. Step 1: Write the proportion equation
   142,543.10 : 196,696.12 = 85,171 : x
2. Step 2: Convert to fraction form
   142,543.10/196,696.12 = 85,171/x
3. Step 3: Cross multiply
   142,543.10x = 196,696.12 × 85,171
4. Step 4: Simplify right side
   142,543.10x = 16,752,805,236.52
5. Step 5: Solve for x
   x = 16,752,805,236.52/142,543.10
6. Step 6: Final answer
   x = 117,528.00