Finding the Fourth Proportional to 139,627.82, 192,771.92 and 85,985.49

Step by Step Solution

1. Step 1: Write the proportion equation
   139,627.82 : 192,771.92 = 85,985.49 : x
2. Step 2: Convert to fraction form
   139,627.82/192,771.92 = 85,985.49/x
3. Step 3: Cross multiply
   139,627.82x = 192,771.92 × 85,985.49
4. Step 4: Simplify right side
   139,627.82x = 16,575,588,499.46
5. Step 5: Solve for x
   x = 16,575,588,499.46/139,627.82
6. Step 6: Final answer
   x = 118,712.65