Finding the Fourth Proportional to 1,078.84, 1,618.76 and 462.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.84 : 1,618.76 = 462.72 : x
2. Step 2: Convert to fraction form
   1,078.84/1,618.76 = 462.72/x
3. Step 3: Cross multiply
   1,078.84x = 1,618.76 × 462.72
4. Step 4: Simplify right side
   1,078.84x = 749,032.63
5. Step 5: Solve for x
   x = 749,032.63/1,078.84
6. Step 6: Final answer
   x = 694.29