Finding the Fourth Proportional to 139,480.45, 192,483.72 and 75,818.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,480.45 : 192,483.72 = 75,818.25 : x
2. Step 2: Convert to fraction form
   139,480.45/192,483.72 = 75,818.25/x
3. Step 3: Cross multiply
   139,480.45x = 192,483.72 × 75,818.25
4. Step 4: Simplify right side
   139,480.45x = 14,593,778,803.89
5. Step 5: Solve for x
   x = 14,593,778,803.89/139,480.45
6. Step 6: Final answer
   x = 104,629.57