Finding the Fourth Proportional to 1,123.58, 1,682.15 and 892.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.58 : 1,682.15 = 892.80 : x
2. Step 2: Convert to fraction form
   1,123.58/1,682.15 = 892.80/x
3. Step 3: Cross multiply
   1,123.58x = 1,682.15 × 892.80
4. Step 4: Simplify right side
   1,123.58x = 1,501,819.06
5. Step 5: Solve for x
   x = 1,501,819.06/1,123.58
6. Step 6: Final answer
   x = 1,336.63