Finding the Fourth Proportional to 1,434.52, 1,979.62 and 813.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.52 : 1,979.62 = 813.48 : x
2. Step 2: Convert to fraction form
   1,434.52/1,979.62 = 813.48/x
3. Step 3: Cross multiply
   1,434.52x = 1,979.62 × 813.48
4. Step 4: Simplify right side
   1,434.52x = 1,610,381.28
5. Step 5: Solve for x
   x = 1,610,381.28/1,434.52
6. Step 6: Final answer
   x = 1,122.59