Finding the Fourth Proportional to 1,124.31, 1,685.28 and 776.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,124.31 : 1,685.28 = 776.52 : x
2. Step 2: Convert to fraction form
   1,124.31/1,685.28 = 776.52/x
3. Step 3: Cross multiply
   1,124.31x = 1,685.28 × 776.52
4. Step 4: Simplify right side
   1,124.31x = 1,308,653.63
5. Step 5: Solve for x
   x = 1,308,653.63/1,124.31
6. Step 6: Final answer
   x = 1,163.96