Finding the Fourth Proportional to 498.59, 747.70 and 190.52

Step by Step Solution

1. Step 1: Write the proportion equation
   498.59 : 747.70 = 190.52 : x
2. Step 2: Convert to fraction form
   498.59/747.70 = 190.52/x
3. Step 3: Cross multiply
   498.59x = 747.70 × 190.52
4. Step 4: Simplify right side
   498.59x = 142,454.15
5. Step 5: Solve for x
   x = 142,454.15/498.59
6. Step 6: Final answer
   x = 285.72