Finding the Fourth Proportional to 123,072.98, 169,897.42 and 72,078.62

Step by Step Solution

1. Step 1: Write the proportion equation
   123,072.98 : 169,897.42 = 72,078.62 : x
2. Step 2: Convert to fraction form
   123,072.98/169,897.42 = 72,078.62/x
3. Step 3: Cross multiply
   123,072.98x = 169,897.42 × 72,078.62
4. Step 4: Simplify right side
   123,072.98x = 12,245,971,575.16
5. Step 5: Solve for x
   x = 12,245,971,575.16/123,072.98
6. Step 6: Final answer
   x = 99,501.71