Finding the Fourth Proportional to 143,915.30, 198,603.32 and 79,383.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,915.30 : 198,603.32 = 79,383.10 : x
2. Step 2: Convert to fraction form
   143,915.30/198,603.32 = 79,383.10/x
3. Step 3: Cross multiply
   143,915.30x = 198,603.32 × 79,383.10
4. Step 4: Simplify right side
   143,915.30x = 15,765,747,211.89
5. Step 5: Solve for x
   x = 15,765,747,211.89/143,915.30
6. Step 6: Final answer
   x = 109,548.79