Finding the Fourth Proportional to 1,208.50, 1,803.62 and 1,091.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.50 : 1,803.62 = 1,091.86 : x
2. Step 2: Convert to fraction form
   1,208.50/1,803.62 = 1,091.86/x
3. Step 3: Cross multiply
   1,208.50x = 1,803.62 × 1,091.86
4. Step 4: Simplify right side
   1,208.50x = 1,969,300.53
5. Step 5: Solve for x
   x = 1,969,300.53/1,208.50
6. Step 6: Final answer
   x = 1,629.54