Finding the Fourth Proportional to 2,315.34, 3,473.61 and 928.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.34 : 3,473.61 = 928.72 : x
2. Step 2: Convert to fraction form
   2,315.34/3,473.61 = 928.72/x
3. Step 3: Cross multiply
   2,315.34x = 3,473.61 × 928.72
4. Step 4: Simplify right side
   2,315.34x = 3,226,011.08
5. Step 5: Solve for x
   x = 3,226,011.08/2,315.34
6. Step 6: Final answer
   x = 1,393.32