Finding the Fourth Proportional to 1,224.58, 1,835.57 and 668.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224.58 : 1,835.57 = 668.72 : x
2. Step 2: Convert to fraction form
   1,224.58/1,835.57 = 668.72/x
3. Step 3: Cross multiply
   1,224.58x = 1,835.57 × 668.72
4. Step 4: Simplify right side
   1,224.58x = 1,227,482.37
5. Step 5: Solve for x
   x = 1,227,482.37/1,224.58
6. Step 6: Final answer
   x = 1,002.37