Finding the Fourth Proportional to 139,830.45, 192,890.21 and 83,230.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,830.45 : 192,890.21 = 83,230.89 : x
2. Step 2: Convert to fraction form
   139,830.45/192,890.21 = 83,230.89/x
3. Step 3: Cross multiply
   139,830.45x = 192,890.21 × 83,230.89
4. Step 4: Simplify right side
   139,830.45x = 16,054,423,434.43
5. Step 5: Solve for x
   x = 16,054,423,434.43/139,830.45
6. Step 6: Final answer
   x = 114,813.50