Finding the Fourth Proportional to 139,469.04, 192,575.88 and 85,779

Step by Step Solution

1. Step 1: Write the proportion equation
   139,469.04 : 192,575.88 = 85,779 : x
2. Step 2: Convert to fraction form
   139,469.04/192,575.88 = 85,779/x
3. Step 3: Cross multiply
   139,469.04x = 192,575.88 × 85,779
4. Step 4: Simplify right side
   139,469.04x = 16,518,966,410.52
5. Step 5: Solve for x
   x = 16,518,966,410.52/139,469.04
6. Step 6: Final answer
   x = 118,441.82