Finding the Fourth Proportional to 1,655.16, 2,480.04 and 776.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,655.16 : 2,480.04 = 776.72 : x
2. Step 2: Convert to fraction form
   1,655.16/2,480.04 = 776.72/x
3. Step 3: Cross multiply
   1,655.16x = 2,480.04 × 776.72
4. Step 4: Simplify right side
   1,655.16x = 1,926,284.27
5. Step 5: Solve for x
   x = 1,926,284.27/1,655.16
6. Step 6: Final answer
   x = 1,163.81