Finding the Fourth Proportional to 1,019.09, 1,528.36 and 471.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.09 : 1,528.36 = 471.53 : x
2. Step 2: Convert to fraction form
   1,019.09/1,528.36 = 471.53/x
3. Step 3: Cross multiply
   1,019.09x = 1,528.36 × 471.53
4. Step 4: Simplify right side
   1,019.09x = 720,667.59
5. Step 5: Solve for x
   x = 720,667.59/1,019.09
6. Step 6: Final answer
   x = 707.17