Finding the Fourth Proportional to 1,813.58, 2,503.57 and 1,485.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,813.58 : 2,503.57 = 1,485.53 : x
2. Step 2: Convert to fraction form
   1,813.58/2,503.57 = 1,485.53/x
3. Step 3: Cross multiply
   1,813.58x = 2,503.57 × 1,485.53
4. Step 4: Simplify right side
   1,813.58x = 3,719,128.34
5. Step 5: Solve for x
   x = 3,719,128.34/1,813.58
6. Step 6: Final answer
   x = 2,050.71