Finding the Fourth Proportional to 1,019.41, 1,528.73 and 434.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.41 : 1,528.73 = 434.69 : x
2. Step 2: Convert to fraction form
   1,019.41/1,528.73 = 434.69/x
3. Step 3: Cross multiply
   1,019.41x = 1,528.73 × 434.69
4. Step 4: Simplify right side
   1,019.41x = 664,526.71
5. Step 5: Solve for x
   x = 664,526.71/1,019.41
6. Step 6: Final answer
   x = 651.87