Finding the Fourth Proportional to 1,962.79, 2,945.61 and 777.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,962.79 : 2,945.61 = 777.02 : x
2. Step 2: Convert to fraction form
   1,962.79/2,945.61 = 777.02/x
3. Step 3: Cross multiply
   1,962.79x = 2,945.61 × 777.02
4. Step 4: Simplify right side
   1,962.79x = 2,288,783.15
5. Step 5: Solve for x
   x = 2,288,783.15/1,962.79
6. Step 6: Final answer
   x = 1,166.09