Finding the Fourth Proportional to 1,114.58, 1,671.34 and 498.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,114.58 : 1,671.34 = 498.28 : x
2. Step 2: Convert to fraction form
   1,114.58/1,671.34 = 498.28/x
3. Step 3: Cross multiply
   1,114.58x = 1,671.34 × 498.28
4. Step 4: Simplify right side
   1,114.58x = 832,800.72
5. Step 5: Solve for x
   x = 832,800.72/1,114.58
6. Step 6: Final answer
   x = 747.19