Finding the Fourth Proportional to 1,071.87, 1,606.89 and 1,020.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.87 : 1,606.89 = 1,020.84 : x
2. Step 2: Convert to fraction form
   1,071.87/1,606.89 = 1,020.84/x
3. Step 3: Cross multiply
   1,071.87x = 1,606.89 × 1,020.84
4. Step 4: Simplify right side
   1,071.87x = 1,640,377.59
5. Step 5: Solve for x
   x = 1,640,377.59/1,071.87
6. Step 6: Final answer
   x = 1,530.39