Finding the Fourth Proportional to 143,503.98, 198,089.64 and 123,279.72

Step by Step Solution

1. Step 1: Write the proportion equation
   143,503.98 : 198,089.64 = 123,279.72 : x
2. Step 2: Convert to fraction form
   143,503.98/198,089.64 = 123,279.72/x
3. Step 3: Cross multiply
   143,503.98x = 198,089.64 × 123,279.72
4. Step 4: Simplify right side
   143,503.98x = 24,420,435,354.10
5. Step 5: Solve for x
   x = 24,420,435,354.10/143,503.98
6. Step 6: Final answer
   x = 170,172.53