Finding the Fourth Proportional to 1,156.54, 1,733.72 and 386.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.54 : 1,733.72 = 386.50 : x
2. Step 2: Convert to fraction form
   1,156.54/1,733.72 = 386.50/x
3. Step 3: Cross multiply
   1,156.54x = 1,733.72 × 386.50
4. Step 4: Simplify right side
   1,156.54x = 670,082.78
5. Step 5: Solve for x
   x = 670,082.78/1,156.54
6. Step 6: Final answer
   x = 579.39