Finding the Fourth Proportional to 1,262.79, 1,892.10 and 774.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,262.79 : 1,892.10 = 774.81 : x
2. Step 2: Convert to fraction form
   1,262.79/1,892.10 = 774.81/x
3. Step 3: Cross multiply
   1,262.79x = 1,892.10 × 774.81
4. Step 4: Simplify right side
   1,262.79x = 1,466,018.00
5. Step 5: Solve for x
   x = 1,466,018.00/1,262.79
6. Step 6: Final answer
   x = 1,160.94