Finding the Fourth Proportional to 1,403.30, 1,935.59 and 813.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.30 : 1,935.59 = 813.84 : x
2. Step 2: Convert to fraction form
   1,403.30/1,935.59 = 813.84/x
3. Step 3: Cross multiply
   1,403.30x = 1,935.59 × 813.84
4. Step 4: Simplify right side
   1,403.30x = 1,575,256.50
5. Step 5: Solve for x
   x = 1,575,256.50/1,403.30
6. Step 6: Final answer
   x = 1,122.54