Finding the Fourth Proportional to 1,811.99, 2,499.63 and 1,147.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.99 : 2,499.63 = 1,147.79 : x
2. Step 2: Convert to fraction form
   1,811.99/2,499.63 = 1,147.79/x
3. Step 3: Cross multiply
   1,811.99x = 2,499.63 × 1,147.79
4. Step 4: Simplify right side
   1,811.99x = 2,869,047.89
5. Step 5: Solve for x
   x = 2,869,047.89/1,811.99
6. Step 6: Final answer
   x = 1,583.37