Finding the Fourth Proportional to 1,034.91, 1,557.60 and 776.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.91 : 1,557.60 = 776.31 : x
2. Step 2: Convert to fraction form
   1,034.91/1,557.60 = 776.31/x
3. Step 3: Cross multiply
   1,034.91x = 1,557.60 × 776.31
4. Step 4: Simplify right side
   1,034.91x = 1,209,180.46
5. Step 5: Solve for x
   x = 1,209,180.46/1,034.91
6. Step 6: Final answer
   x = 1,168.39