Finding the Fourth Proportional to 1,004.89, 1,506.18 and 388.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.89 : 1,506.18 = 388.29 : x
2. Step 2: Convert to fraction form
   1,004.89/1,506.18 = 388.29/x
3. Step 3: Cross multiply
   1,004.89x = 1,506.18 × 388.29
4. Step 4: Simplify right side
   1,004.89x = 584,834.63
5. Step 5: Solve for x
   x = 584,834.63/1,004.89
6. Step 6: Final answer
   x = 581.99