Finding the Fourth Proportional to 1,012.42, 1,395.07 and 776.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.42 : 1,395.07 = 776.37 : x
2. Step 2: Convert to fraction form
   1,012.42/1,395.07 = 776.37/x
3. Step 3: Cross multiply
   1,012.42x = 1,395.07 × 776.37
4. Step 4: Simplify right side
   1,012.42x = 1,083,090.50
5. Step 5: Solve for x
   x = 1,083,090.50/1,012.42
6. Step 6: Final answer
   x = 1,069.80