Finding the Fourth Proportional to 1,238.50, 1,704 and 1,072.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.50 : 1,704 = 1,072.18 : x
2. Step 2: Convert to fraction form
   1,238.50/1,704 = 1,072.18/x
3. Step 3: Cross multiply
   1,238.50x = 1,704 × 1,072.18
4. Step 4: Simplify right side
   1,238.50x = 1,826,994.72
5. Step 5: Solve for x
   x = 1,826,994.72/1,238.50
6. Step 6: Final answer
   x = 1,475.17