Finding the Fourth Proportional to 112,620.80, 155,414.72 and 64,874

Step by Step Solution

1. Step 1: Write the proportion equation
   112,620.80 : 155,414.72 = 64,874 : x
2. Step 2: Convert to fraction form
   112,620.80/155,414.72 = 64,874/x
3. Step 3: Cross multiply
   112,620.80x = 155,414.72 × 64,874
4. Step 4: Simplify right side
   112,620.80x = 10,082,374,545.28
5. Step 5: Solve for x
   x = 10,082,374,545.28/112,620.80
6. Step 6: Final answer
   x = 89,524.98