Finding the Fourth Proportional to 1,617.63, 2,425.83 and 521.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617.63 : 2,425.83 = 521.83 : x
2. Step 2: Convert to fraction form
   1,617.63/2,425.83 = 521.83/x
3. Step 3: Cross multiply
   1,617.63x = 2,425.83 × 521.83
4. Step 4: Simplify right side
   1,617.63x = 1,265,870.87
5. Step 5: Solve for x
   x = 1,265,870.87/1,617.63
6. Step 6: Final answer
   x = 782.55