Finding the Fourth Proportional to 139,990.03, 193,181.43 and 79,559.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,990.03 : 193,181.43 = 79,559.62 : x
2. Step 2: Convert to fraction form
   139,990.03/193,181.43 = 79,559.62/x
3. Step 3: Cross multiply
   139,990.03x = 193,181.43 × 79,559.62
4. Step 4: Simplify right side
   139,990.03x = 15,369,441,161.86
5. Step 5: Solve for x
   x = 15,369,441,161.86/139,990.03
6. Step 6: Final answer
   x = 109,789.54