Finding the Fourth Proportional to 2,656.15, 3,984.69 and 807.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.15 : 3,984.69 = 807.45 : x
2. Step 2: Convert to fraction form
   2,656.15/3,984.69 = 807.45/x
3. Step 3: Cross multiply
   2,656.15x = 3,984.69 × 807.45
4. Step 4: Simplify right side
   2,656.15x = 3,217,444.87
5. Step 5: Solve for x
   x = 3,217,444.87/2,656.15
6. Step 6: Final answer
   x = 1,211.32