Finding the Fourth Proportional to 139,575.12, 192,570.22 and 79,141

Step by Step Solution

1. Step 1: Write the proportion equation
   139,575.12 : 192,570.22 = 79,141 : x
2. Step 2: Convert to fraction form
   139,575.12/192,570.22 = 79,141/x
3. Step 3: Cross multiply
   139,575.12x = 192,570.22 × 79,141
4. Step 4: Simplify right side
   139,575.12x = 15,240,199,781.02
5. Step 5: Solve for x
   x = 15,240,199,781.02/139,575.12
6. Step 6: Final answer
   x = 109,189.95