Finding the Fourth Proportional to 2,870.19, 4,305.72 and 922.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.19 : 4,305.72 = 922.41 : x
2. Step 2: Convert to fraction form
   2,870.19/4,305.72 = 922.41/x
3. Step 3: Cross multiply
   2,870.19x = 4,305.72 × 922.41
4. Step 4: Simplify right side
   2,870.19x = 3,971,639.19
5. Step 5: Solve for x
   x = 3,971,639.19/2,870.19
6. Step 6: Final answer
   x = 1,383.75