Finding the Fourth Proportional to 1,617.72, 2,426.34 and 521.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617.72 : 2,426.34 = 521.94 : x
2. Step 2: Convert to fraction form
   1,617.72/2,426.34 = 521.94/x
3. Step 3: Cross multiply
   1,617.72x = 2,426.34 × 521.94
4. Step 4: Simplify right side
   1,617.72x = 1,266,403.90
5. Step 5: Solve for x
   x = 1,266,403.90/1,617.72
6. Step 6: Final answer
   x = 782.83