Finding the Fourth Proportional to 1,868.09, 2,577.71 and 1,071.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.09 : 2,577.71 = 1,071.32 : x
2. Step 2: Convert to fraction form
   1,868.09/2,577.71 = 1,071.32/x
3. Step 3: Cross multiply
   1,868.09x = 2,577.71 × 1,071.32
4. Step 4: Simplify right side
   1,868.09x = 2,761,552.28
5. Step 5: Solve for x
   x = 2,761,552.28/1,868.09
6. Step 6: Final answer
   x = 1,478.28