Finding the Fourth Proportional to 999.47, 1,499.69 and 383.42

Step by Step Solution

1. Step 1: Write the proportion equation
   999.47 : 1,499.69 = 383.42 : x
2. Step 2: Convert to fraction form
   999.47/1,499.69 = 383.42/x
3. Step 3: Cross multiply
   999.47x = 1,499.69 × 383.42
4. Step 4: Simplify right side
   999.47x = 575,001.72
5. Step 5: Solve for x
   x = 575,001.72/999.47
6. Step 6: Final answer
   x = 575.31