Finding the Fourth Proportional to 1,059.75, 1,462.59 and 617.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.75 : 1,462.59 = 617.63 : x
2. Step 2: Convert to fraction form
   1,059.75/1,462.59 = 617.63/x
3. Step 3: Cross multiply
   1,059.75x = 1,462.59 × 617.63
4. Step 4: Simplify right side
   1,059.75x = 903,332.15
5. Step 5: Solve for x
   x = 903,332.15/1,059.75
6. Step 6: Final answer
   x = 852.40