Finding the Fourth Proportional to 1,382.54, 2,070.78 and 1,071.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.54 : 2,070.78 = 1,071.96 : x
2. Step 2: Convert to fraction form
   1,382.54/2,070.78 = 1,071.96/x
3. Step 3: Cross multiply
   1,382.54x = 2,070.78 × 1,071.96
4. Step 4: Simplify right side
   1,382.54x = 2,219,793.33
5. Step 5: Solve for x
   x = 2,219,793.33/1,382.54
6. Step 6: Final answer
   x = 1,605.59