Finding the Fourth Proportional to 1,813.62, 2,499.06 and 1,393.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,813.62 : 2,499.06 = 1,393.95 : x
2. Step 2: Convert to fraction form
   1,813.62/2,499.06 = 1,393.95/x
3. Step 3: Cross multiply
   1,813.62x = 2,499.06 × 1,393.95
4. Step 4: Simplify right side
   1,813.62x = 3,483,564.69
5. Step 5: Solve for x
   x = 3,483,564.69/1,813.62
6. Step 6: Final answer
   x = 1,920.78