Finding the Fourth Proportional to 2,219.16, 3,329.58 and 920.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.16 : 3,329.58 = 920.52 : x
2. Step 2: Convert to fraction form
   2,219.16/3,329.58 = 920.52/x
3. Step 3: Cross multiply
   2,219.16x = 3,329.58 × 920.52
4. Step 4: Simplify right side
   2,219.16x = 3,064,944.98
5. Step 5: Solve for x
   x = 3,064,944.98/2,219.16
6. Step 6: Final answer
   x = 1,381.13