Finding the Fourth Proportional to 2,616.82, 3,925.21 and 929.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.82 : 3,925.21 = 929.47 : x
2. Step 2: Convert to fraction form
   2,616.82/3,925.21 = 929.47/x
3. Step 3: Cross multiply
   2,616.82x = 3,925.21 × 929.47
4. Step 4: Simplify right side
   2,616.82x = 3,648,364.94
5. Step 5: Solve for x
   x = 3,648,364.94/2,616.82
6. Step 6: Final answer
   x = 1,394.20