Finding the Fourth Proportional to 1,141.86, 1,575.76 and 617.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.86 : 1,575.76 = 617.89 : x
2. Step 2: Convert to fraction form
   1,141.86/1,575.76 = 617.89/x
3. Step 3: Cross multiply
   1,141.86x = 1,575.76 × 617.89
4. Step 4: Simplify right side
   1,141.86x = 973,646.35
5. Step 5: Solve for x
   x = 973,646.35/1,141.86
6. Step 6: Final answer
   x = 852.68