Finding the Fourth Proportional to 123,100.98, 169,920.90 and 76,570.08

Step by Step Solution

1. Step 1: Write the proportion equation
   123,100.98 : 169,920.90 = 76,570.08 : x
2. Step 2: Convert to fraction form
   123,100.98/169,920.90 = 76,570.08/x
3. Step 3: Cross multiply
   123,100.98x = 169,920.90 × 76,570.08
4. Step 4: Simplify right side
   123,100.98x = 13,010,856,906.67
5. Step 5: Solve for x
   x = 13,010,856,906.67/123,100.98
6. Step 6: Final answer
   x = 105,692.55