Finding the Fourth Proportional to 1,234.24, 1,851.12 and 454.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,234.24 : 1,851.12 = 454.72 : x
2. Step 2: Convert to fraction form
   1,234.24/1,851.12 = 454.72/x
3. Step 3: Cross multiply
   1,234.24x = 1,851.12 × 454.72
4. Step 4: Simplify right side
   1,234.24x = 841,741.29
5. Step 5: Solve for x
   x = 841,741.29/1,234.24
6. Step 6: Final answer
   x = 681.99