Finding the Fourth Proportional to 1,617.98, 2,429.40 and 925.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617.98 : 2,429.40 = 925.43 : x
2. Step 2: Convert to fraction form
   1,617.98/2,429.40 = 925.43/x
3. Step 3: Cross multiply
   1,617.98x = 2,429.40 × 925.43
4. Step 4: Simplify right side
   1,617.98x = 2,248,228.58
5. Step 5: Solve for x
   x = 2,248,228.58/1,617.98
6. Step 6: Final answer
   x = 1,389.53