Finding the Fourth Proportional to 830.33, 1,145.55 and 498.69

Step by Step Solution

1. Step 1: Write the proportion equation
   830.33 : 1,145.55 = 498.69 : x
2. Step 2: Convert to fraction form
   830.33/1,145.55 = 498.69/x
3. Step 3: Cross multiply
   830.33x = 1,145.55 × 498.69
4. Step 4: Simplify right side
   830.33x = 571,274.33
5. Step 5: Solve for x
   x = 571,274.33/830.33
6. Step 6: Final answer
   x = 688.01