Finding the Fourth Proportional to 1,868.54, 2,799.12 and 1,086.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.54 : 2,799.12 = 1,086.58 : x
2. Step 2: Convert to fraction form
   1,868.54/2,799.12 = 1,086.58/x
3. Step 3: Cross multiply
   1,868.54x = 2,799.12 × 1,086.58
4. Step 4: Simplify right side
   1,868.54x = 3,041,453.81
5. Step 5: Solve for x
   x = 3,041,453.81/1,868.54
6. Step 6: Final answer
   x = 1,627.72