Finding the Fourth Proportional to 139,131.72, 192,032.10 and 85,444.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,131.72 : 192,032.10 = 85,444.92 : x
2. Step 2: Convert to fraction form
   139,131.72/192,032.10 = 85,444.92/x
3. Step 3: Cross multiply
   139,131.72x = 192,032.10 × 85,444.92
4. Step 4: Simplify right side
   139,131.72x = 16,408,167,421.93
5. Step 5: Solve for x
   x = 16,408,167,421.93/139,131.72
6. Step 6: Final answer
   x = 117,932.61