Finding the Fourth Proportional to 1,340.76, 1,849.59 and 815.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.76 : 1,849.59 = 815.88 : x
2. Step 2: Convert to fraction form
   1,340.76/1,849.59 = 815.88/x
3. Step 3: Cross multiply
   1,340.76x = 1,849.59 × 815.88
4. Step 4: Simplify right side
   1,340.76x = 1,509,043.49
5. Step 5: Solve for x
   x = 1,509,043.49/1,340.76
6. Step 6: Final answer
   x = 1,125.51