Finding the Fourth Proportional to 2,100.72, 3,152.28 and 946.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.72 : 3,152.28 = 946.56 : x
2. Step 2: Convert to fraction form
   2,100.72/3,152.28 = 946.56/x
3. Step 3: Cross multiply
   2,100.72x = 3,152.28 × 946.56
4. Step 4: Simplify right side
   2,100.72x = 2,983,822.16
5. Step 5: Solve for x
   x = 2,983,822.16/2,100.72
6. Step 6: Final answer
   x = 1,420.38