Finding the Fourth Proportional to 142,538.10, 196,689.22 and 85,166.00

Step by Step Solution

1. Step 1: Write the proportion equation
   142,538.10 : 196,689.22 = 85,166.00 : x
2. Step 2: Convert to fraction form
   142,538.10/196,689.22 = 85,166.00/x
3. Step 3: Cross multiply
   142,538.10x = 196,689.22 × 85,166.00
4. Step 4: Simplify right side
   142,538.10x = 16,751,233,127.07
5. Step 5: Solve for x
   x = 16,751,233,127.07/142,538.10
6. Step 6: Final answer
   x = 117,521.10