Finding the Fourth Proportional to 925.98, 1,387.98 and 348.72

Step by Step Solution

1. Step 1: Write the proportion equation
   925.98 : 1,387.98 = 348.72 : x
2. Step 2: Convert to fraction form
   925.98/1,387.98 = 348.72/x
3. Step 3: Cross multiply
   925.98x = 1,387.98 × 348.72
4. Step 4: Simplify right side
   925.98x = 484,016.39
5. Step 5: Solve for x
   x = 484,016.39/925.98
6. Step 6: Final answer
   x = 522.71