Finding the Fourth Proportional to 2,870.73, 4,305.17 and 922.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.73 : 4,305.17 = 922.47 : x
2. Step 2: Convert to fraction form
   2,870.73/4,305.17 = 922.47/x
3. Step 3: Cross multiply
   2,870.73x = 4,305.17 × 922.47
4. Step 4: Simplify right side
   2,870.73x = 3,971,385.56
5. Step 5: Solve for x
   x = 3,971,385.56/2,870.73
6. Step 6: Final answer
   x = 1,383.41