Finding the Fourth Proportional to 139,271.99, 192,196.13 and 81,913.73

Step by Step Solution

1. Step 1: Write the proportion equation
   139,271.99 : 192,196.13 = 81,913.73 : x
2. Step 2: Convert to fraction form
   139,271.99/192,196.13 = 81,913.73/x
3. Step 3: Cross multiply
   139,271.99x = 192,196.13 × 81,913.73
4. Step 4: Simplify right side
   139,271.99x = 15,743,501,899.86
5. Step 5: Solve for x
   x = 15,743,501,899.86/139,271.99
6. Step 6: Final answer
   x = 113,041.41