Finding the Fourth Proportional to 1,308.15, 1,804.86 and 1,086.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.15 : 1,804.86 = 1,086.75 : x
2. Step 2: Convert to fraction form
   1,308.15/1,804.86 = 1,086.75/x
3. Step 3: Cross multiply
   1,308.15x = 1,804.86 × 1,086.75
4. Step 4: Simplify right side
   1,308.15x = 1,961,431.61
5. Step 5: Solve for x
   x = 1,961,431.61/1,308.15
6. Step 6: Final answer
   x = 1,499.39