Finding the Fourth Proportional to 1,921.72, 2,883.39 and 947.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.72 : 2,883.39 = 947.83 : x
2. Step 2: Convert to fraction form
   1,921.72/2,883.39 = 947.83/x
3. Step 3: Cross multiply
   1,921.72x = 2,883.39 × 947.83
4. Step 4: Simplify right side
   1,921.72x = 2,732,963.54
5. Step 5: Solve for x
   x = 2,732,963.54/1,921.72
6. Step 6: Final answer
   x = 1,422.14