Finding the Fourth Proportional to 2,070.63, 2,856.06 and 1,283.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.63 : 2,856.06 = 1,283.31 : x
2. Step 2: Convert to fraction form
   2,070.63/2,856.06 = 1,283.31/x
3. Step 3: Cross multiply
   2,070.63x = 2,856.06 × 1,283.31
4. Step 4: Simplify right side
   2,070.63x = 3,665,210.36
5. Step 5: Solve for x
   x = 3,665,210.36/2,070.63
6. Step 6: Final answer
   x = 1,770.09