Finding the Fourth Proportional to 1,337.62, 1,845.90 and 813.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.62 : 1,845.90 = 813.28 : x
2. Step 2: Convert to fraction form
   1,337.62/1,845.90 = 813.28/x
3. Step 3: Cross multiply
   1,337.62x = 1,845.90 × 813.28
4. Step 4: Simplify right side
   1,337.62x = 1,501,233.55
5. Step 5: Solve for x
   x = 1,501,233.55/1,337.62
6. Step 6: Final answer
   x = 1,122.32