Finding the Fourth Proportional to 1,290.03, 1,779.57 and 792.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.03 : 1,779.57 = 792.78 : x
2. Step 2: Convert to fraction form
   1,290.03/1,779.57 = 792.78/x
3. Step 3: Cross multiply
   1,290.03x = 1,779.57 × 792.78
4. Step 4: Simplify right side
   1,290.03x = 1,410,807.50
5. Step 5: Solve for x
   x = 1,410,807.50/1,290.03
6. Step 6: Final answer
   x = 1,093.62