Finding the Fourth Proportional to 2,431.81, 3,648.17 and 788.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.81 : 3,648.17 = 788.32 : x
2. Step 2: Convert to fraction form
   2,431.81/3,648.17 = 788.32/x
3. Step 3: Cross multiply
   2,431.81x = 3,648.17 × 788.32
4. Step 4: Simplify right side
   2,431.81x = 2,875,925.37
5. Step 5: Solve for x
   x = 2,875,925.37/2,431.81
6. Step 6: Final answer
   x = 1,182.63