Finding the Fourth Proportional to 1,374.76, 1,896.42 and 815.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,374.76 : 1,896.42 = 815.08 : x
2. Step 2: Convert to fraction form
   1,374.76/1,896.42 = 815.08/x
3. Step 3: Cross multiply
   1,374.76x = 1,896.42 × 815.08
4. Step 4: Simplify right side
   1,374.76x = 1,545,734.01
5. Step 5: Solve for x
   x = 1,545,734.01/1,374.76
6. Step 6: Final answer
   x = 1,124.37