Finding the Fourth Proportional to 2,086.54, 3,130.02 and 770.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.54 : 3,130.02 = 770.02 : x
2. Step 2: Convert to fraction form
   2,086.54/3,130.02 = 770.02/x
3. Step 3: Cross multiply
   2,086.54x = 3,130.02 × 770.02
4. Step 4: Simplify right side
   2,086.54x = 2,410,178.00
5. Step 5: Solve for x
   x = 2,410,178.00/2,086.54
6. Step 6: Final answer
   x = 1,155.11