Finding the Fourth Proportional to 1,046.56, 1,569.84 and 613.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.56 : 1,569.84 = 613.12 : x
2. Step 2: Convert to fraction form
   1,046.56/1,569.84 = 613.12/x
3. Step 3: Cross multiply
   1,046.56x = 1,569.84 × 613.12
4. Step 4: Simplify right side
   1,046.56x = 962,500.30
5. Step 5: Solve for x
   x = 962,500.30/1,046.56
6. Step 6: Final answer
   x = 919.68