Finding the Fourth Proportional to 1,358.30, 2,034.83 and 810.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.30 : 2,034.83 = 810.92 : x
2. Step 2: Convert to fraction form
   1,358.30/2,034.83 = 810.92/x
3. Step 3: Cross multiply
   1,358.30x = 2,034.83 × 810.92
4. Step 4: Simplify right side
   1,358.30x = 1,650,084.34
5. Step 5: Solve for x
   x = 1,650,084.34/1,358.30
6. Step 6: Final answer
   x = 1,214.82