Finding the Fourth Proportional to 139,885.43, 193,035.86 and 79,455.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,885.43 : 193,035.86 = 79,455.89 : x
2. Step 2: Convert to fraction form
   139,885.43/193,035.86 = 79,455.89/x
3. Step 3: Cross multiply
   139,885.43x = 193,035.86 × 79,455.89
4. Step 4: Simplify right side
   139,885.43x = 15,337,836,143.53
5. Step 5: Solve for x
   x = 15,337,836,143.53/139,885.43
6. Step 6: Final answer
   x = 109,645.70