Finding the Fourth Proportional to 1,362.87, 2,041.88 and 813.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.87 : 2,041.88 = 813.99 : x
2. Step 2: Convert to fraction form
   1,362.87/2,041.88 = 813.99/x
3. Step 3: Cross multiply
   1,362.87x = 2,041.88 × 813.99
4. Step 4: Simplify right side
   1,362.87x = 1,662,073.49
5. Step 5: Solve for x
   x = 1,662,073.49/1,362.87
6. Step 6: Final answer
   x = 1,219.54