Finding the Fourth Proportional to 1,141.79, 1,575.67 and 617.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.79 : 1,575.67 = 617.82 : x
2. Step 2: Convert to fraction form
   1,141.79/1,575.67 = 617.82/x
3. Step 3: Cross multiply
   1,141.79x = 1,575.67 × 617.82
4. Step 4: Simplify right side
   1,141.79x = 973,474.96
5. Step 5: Solve for x
   x = 973,474.96/1,141.79
6. Step 6: Final answer
   x = 852.59