Finding the Fourth Proportional to 1,158.30, 1,733.30 and 928.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.30 : 1,733.30 = 928.67 : x
2. Step 2: Convert to fraction form
   1,158.30/1,733.30 = 928.67/x
3. Step 3: Cross multiply
   1,158.30x = 1,733.30 × 928.67
4. Step 4: Simplify right side
   1,158.30x = 1,609,653.88
5. Step 5: Solve for x
   x = 1,609,653.88/1,158.30
6. Step 6: Final answer
   x = 1,389.67