Finding the Fourth Proportional to 1,359.16, 1,875.70 and 769.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.16 : 1,875.70 = 769.74 : x
2. Step 2: Convert to fraction form
   1,359.16/1,875.70 = 769.74/x
3. Step 3: Cross multiply
   1,359.16x = 1,875.70 × 769.74
4. Step 4: Simplify right side
   1,359.16x = 1,443,801.32
5. Step 5: Solve for x
   x = 1,443,801.32/1,359.16
6. Step 6: Final answer
   x = 1,062.27