Finding the Fourth Proportional to 1,115.48, 1,672.49 and 498.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,115.48 : 1,672.49 = 498.34 : x
2. Step 2: Convert to fraction form
   1,115.48/1,672.49 = 498.34/x
3. Step 3: Cross multiply
   1,115.48x = 1,672.49 × 498.34
4. Step 4: Simplify right side
   1,115.48x = 833,466.15
5. Step 5: Solve for x
   x = 833,466.15/1,115.48
6. Step 6: Final answer
   x = 747.18