Finding the Fourth Proportional to 1,811.56, 2,499.96 and 1,147.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.56 : 2,499.96 = 1,147.72 : x
2. Step 2: Convert to fraction form
   1,811.56/2,499.96 = 1,147.72/x
3. Step 3: Cross multiply
   1,811.56x = 2,499.96 × 1,147.72
4. Step 4: Simplify right side
   1,811.56x = 2,869,254.09
5. Step 5: Solve for x
   x = 2,869,254.09/1,811.56
6. Step 6: Final answer
   x = 1,583.86