Finding the Fourth Proportional to 142,689.06, 196,912.35 and 86,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,689.06 : 196,912.35 = 86,089.50 : x
2. Step 2: Convert to fraction form
   142,689.06/196,912.35 = 86,089.50/x
3. Step 3: Cross multiply
   142,689.06x = 196,912.35 × 86,089.50
4. Step 4: Simplify right side
   142,689.06x = 16,952,085,755.33
5. Step 5: Solve for x
   x = 16,952,085,755.33/142,689.06
6. Step 6: Final answer
   x = 118,804.38