Finding the Fourth Proportional to 1,075.59, 1,610.28 and 612.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.59 : 1,610.28 = 612.27 : x
2. Step 2: Convert to fraction form
   1,075.59/1,610.28 = 612.27/x
3. Step 3: Cross multiply
   1,075.59x = 1,610.28 × 612.27
4. Step 4: Simplify right side
   1,075.59x = 985,926.14
5. Step 5: Solve for x
   x = 985,926.14/1,075.59
6. Step 6: Final answer
   x = 916.64