Finding the Fourth Proportional to 1,809.91, 2,499.21 and 1,147.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,809.91 : 2,499.21 = 1,147.94 : x
2. Step 2: Convert to fraction form
   1,809.91/2,499.21 = 1,147.94/x
3. Step 3: Cross multiply
   1,809.91x = 2,499.21 × 1,147.94
4. Step 4: Simplify right side
   1,809.91x = 2,868,924.89
5. Step 5: Solve for x
   x = 2,868,924.89/1,809.91
6. Step 6: Final answer
   x = 1,585.12