Finding the Fourth Proportional to 1,815.43, 2,505.32 and 1,029.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.43 : 2,505.32 = 1,029.47 : x
2. Step 2: Convert to fraction form
   1,815.43/2,505.32 = 1,029.47/x
3. Step 3: Cross multiply
   1,815.43x = 2,505.32 × 1,029.47
4. Step 4: Simplify right side
   1,815.43x = 2,579,152.90
5. Step 5: Solve for x
   x = 2,579,152.90/1,815.43
6. Step 6: Final answer
   x = 1,420.69