Finding the Fourth Proportional to 139,570.79, 192,608.60 and 75,909.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,570.79 : 192,608.60 = 75,909.05 : x
2. Step 2: Convert to fraction form
   139,570.79/192,608.60 = 75,909.05/x
3. Step 3: Cross multiply
   139,570.79x = 192,608.60 × 75,909.05
4. Step 4: Simplify right side
   139,570.79x = 14,620,735,847.83
5. Step 5: Solve for x
   x = 14,620,735,847.83/139,570.79
6. Step 6: Final answer
   x = 104,754.98