Finding the Fourth Proportional to 139,251.89, 192,267.47 and 85,608.83

Step by Step Solution

1. Step 1: Write the proportion equation
   139,251.89 : 192,267.47 = 85,608.83 : x
2. Step 2: Convert to fraction form
   139,251.89/192,267.47 = 85,608.83/x
3. Step 3: Cross multiply
   139,251.89x = 192,267.47 × 85,608.83
4. Step 4: Simplify right side
   139,251.89x = 16,459,793,153.76
5. Step 5: Solve for x
   x = 16,459,793,153.76/139,251.89
6. Step 6: Final answer
   x = 118,201.58