Finding the Fourth Proportional to 1,095.69, 1,641.12 and 788.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.69 : 1,641.12 = 788.15 : x
2. Step 2: Convert to fraction form
   1,095.69/1,641.12 = 788.15/x
3. Step 3: Cross multiply
   1,095.69x = 1,641.12 × 788.15
4. Step 4: Simplify right side
   1,095.69x = 1,293,440.52
5. Step 5: Solve for x
   x = 1,293,440.52/1,095.69
6. Step 6: Final answer
   x = 1,180.48