Finding the Fourth Proportional to 1,156.78, 1,597.76 and 863.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.78 : 1,597.76 = 863.34 : x
2. Step 2: Convert to fraction form
   1,156.78/1,597.76 = 863.34/x
3. Step 3: Cross multiply
   1,156.78x = 1,597.76 × 863.34
4. Step 4: Simplify right side
   1,156.78x = 1,379,410.12
5. Step 5: Solve for x
   x = 1,379,410.12/1,156.78
6. Step 6: Final answer
   x = 1,192.46