Finding the Fourth Proportional to 1,295.60, 1,788.72 and 798.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,295.60 : 1,788.72 = 798.91 : x
2. Step 2: Convert to fraction form
   1,295.60/1,788.72 = 798.91/x
3. Step 3: Cross multiply
   1,295.60x = 1,788.72 × 798.91
4. Step 4: Simplify right side
   1,295.60x = 1,429,026.30
5. Step 5: Solve for x
   x = 1,429,026.30/1,295.60
6. Step 6: Final answer
   x = 1,102.98