Finding the Fourth Proportional to 1,302.89, 1,798.20 and 779.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,302.89 : 1,798.20 = 779.02 : x
2. Step 2: Convert to fraction form
   1,302.89/1,798.20 = 779.02/x
3. Step 3: Cross multiply
   1,302.89x = 1,798.20 × 779.02
4. Step 4: Simplify right side
   1,302.89x = 1,400,829.27
5. Step 5: Solve for x
   x = 1,400,829.27/1,302.89
6. Step 6: Final answer
   x = 1,075.17