Finding the Fourth Proportional to 2,655.72, 3,984.12 and 807.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,655.72 : 3,984.12 = 807.02 : x
2. Step 2: Convert to fraction form
   2,655.72/3,984.12 = 807.02/x
3. Step 3: Cross multiply
   2,655.72x = 3,984.12 × 807.02
4. Step 4: Simplify right side
   2,655.72x = 3,215,264.52
5. Step 5: Solve for x
   x = 3,215,264.52/2,655.72
6. Step 6: Final answer
   x = 1,210.69