Finding the Fourth Proportional to 2,870.32, 4,305.64 and 922.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.32 : 4,305.64 = 922.38 : x
2. Step 2: Convert to fraction form
   2,870.32/4,305.64 = 922.38/x
3. Step 3: Cross multiply
   2,870.32x = 4,305.64 × 922.38
4. Step 4: Simplify right side
   2,870.32x = 3,971,436.22
5. Step 5: Solve for x
   x = 3,971,436.22/2,870.32
6. Step 6: Final answer
   x = 1,383.62