Finding the Fourth Proportional to 1,075.89, 1,613.43 and 847.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.89 : 1,613.43 = 847.47 : x
2. Step 2: Convert to fraction form
   1,075.89/1,613.43 = 847.47/x
3. Step 3: Cross multiply
   1,075.89x = 1,613.43 × 847.47
4. Step 4: Simplify right side
   1,075.89x = 1,367,333.52
5. Step 5: Solve for x
   x = 1,367,333.52/1,075.89
6. Step 6: Final answer
   x = 1,270.89