Finding the Fourth Proportional to 1,815.30, 2,505.17 and 1,029.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.30 : 2,505.17 = 1,029.38 : x
2. Step 2: Convert to fraction form
   1,815.30/2,505.17 = 1,029.38/x
3. Step 3: Cross multiply
   1,815.30x = 2,505.17 × 1,029.38
4. Step 4: Simplify right side
   1,815.30x = 2,578,771.89
5. Step 5: Solve for x
   x = 2,578,771.89/1,815.30
6. Step 6: Final answer
   x = 1,420.58