Finding the Fourth Proportional to 1,811.32, 2,499.10 and 1,148.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.32 : 2,499.10 = 1,148.47 : x
2. Step 2: Convert to fraction form
   1,811.32/2,499.10 = 1,148.47/x
3. Step 3: Cross multiply
   1,811.32x = 2,499.10 × 1,148.47
4. Step 4: Simplify right side
   1,811.32x = 2,870,141.38
5. Step 5: Solve for x
   x = 2,870,141.38/1,811.32
6. Step 6: Final answer
   x = 1,584.56