Finding the Fourth Proportional to 1,811.72, 2,499.54 and 1,112.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.72 : 2,499.54 = 1,112.84 : x
2. Step 2: Convert to fraction form
   1,811.72/2,499.54 = 1,112.84/x
3. Step 3: Cross multiply
   1,811.72x = 2,499.54 × 1,112.84
4. Step 4: Simplify right side
   1,811.72x = 2,781,588.09
5. Step 5: Solve for x
   x = 2,781,588.09/1,811.72
6. Step 6: Final answer
   x = 1,535.33