Finding the Fourth Proportional to 1,811.98, 2,500.60 and 1,113.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.98 : 2,500.60 = 1,113.58 : x
2. Step 2: Convert to fraction form
   1,811.98/2,500.60 = 1,113.58/x
3. Step 3: Cross multiply
   1,811.98x = 2,500.60 × 1,113.58
4. Step 4: Simplify right side
   1,811.98x = 2,784,618.15
5. Step 5: Solve for x
   x = 2,784,618.15/1,811.98
6. Step 6: Final answer
   x = 1,536.78