Finding the Fourth Proportional to 1,581.82, 2,369.54 and 788.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.82 : 2,369.54 = 788.79 : x
2. Step 2: Convert to fraction form
   1,581.82/2,369.54 = 788.79/x
3. Step 3: Cross multiply
   1,581.82x = 2,369.54 × 788.79
4. Step 4: Simplify right side
   1,581.82x = 1,869,069.46
5. Step 5: Solve for x
   x = 1,869,069.46/1,581.82
6. Step 6: Final answer
   x = 1,181.59