Finding the Fourth Proportional to 1,607.10, 2,407.05 and 1,283.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.10 : 2,407.05 = 1,283.10 : x
2. Step 2: Convert to fraction form
   1,607.10/2,407.05 = 1,283.10/x
3. Step 3: Cross multiply
   1,607.10x = 2,407.05 × 1,283.10
4. Step 4: Simplify right side
   1,607.10x = 3,088,485.86
5. Step 5: Solve for x
   x = 3,088,485.86/1,607.10
6. Step 6: Final answer
   x = 1,921.78