Finding the Fourth Proportional to 1,359.07, 1,875.57 and 769.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.07 : 1,875.57 = 769.61 : x
2. Step 2: Convert to fraction form
   1,359.07/1,875.57 = 769.61/x
3. Step 3: Cross multiply
   1,359.07x = 1,875.57 × 769.61
4. Step 4: Simplify right side
   1,359.07x = 1,443,457.43
5. Step 5: Solve for x
   x = 1,443,457.43/1,359.07
6. Step 6: Final answer
   x = 1,062.10