Finding the Fourth Proportional to 142,690.56, 196,914.42 and 86,091

Step by Step Solution

1. Step 1: Write the proportion equation
   142,690.56 : 196,914.42 = 86,091 : x
2. Step 2: Convert to fraction form
   142,690.56/196,914.42 = 86,091/x
3. Step 3: Cross multiply
   142,690.56x = 196,914.42 × 86,091
4. Step 4: Simplify right side
   142,690.56x = 16,952,559,332.22
5. Step 5: Solve for x
   x = 16,952,559,332.22/142,690.56
6. Step 6: Final answer
   x = 118,806.45