Finding the Fourth Proportional to 2,380.77, 3,572.34 and 920.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.77 : 3,572.34 = 920.94 : x
2. Step 2: Convert to fraction form
   2,380.77/3,572.34 = 920.94/x
3. Step 3: Cross multiply
   2,380.77x = 3,572.34 × 920.94
4. Step 4: Simplify right side
   2,380.77x = 3,289,910.80
5. Step 5: Solve for x
   x = 3,289,910.80/2,380.77
6. Step 6: Final answer
   x = 1,381.87