Finding the Fourth Proportional to 1,238.59, 1,709.59 and 845.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.59 : 1,709.59 = 845.54 : x
2. Step 2: Convert to fraction form
   1,238.59/1,709.59 = 845.54/x
3. Step 3: Cross multiply
   1,238.59x = 1,709.59 × 845.54
4. Step 4: Simplify right side
   1,238.59x = 1,445,518.18
5. Step 5: Solve for x
   x = 1,445,518.18/1,238.59
6. Step 6: Final answer
   x = 1,167.07