Finding the Fourth Proportional to 1,011.57, 1,392.82 and 893.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011.57 : 1,392.82 = 893.10 : x
2. Step 2: Convert to fraction form
   1,011.57/1,392.82 = 893.10/x
3. Step 3: Cross multiply
   1,011.57x = 1,392.82 × 893.10
4. Step 4: Simplify right side
   1,011.57x = 1,243,927.54
5. Step 5: Solve for x
   x = 1,243,927.54/1,011.57
6. Step 6: Final answer
   x = 1,229.70