Finding the Fourth Proportional to 2,652.37, 3,978.72 and 803.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,652.37 : 3,978.72 = 803.47 : x
2. Step 2: Convert to fraction form
   2,652.37/3,978.72 = 803.47/x
3. Step 3: Cross multiply
   2,652.37x = 3,978.72 × 803.47
4. Step 4: Simplify right side
   2,652.37x = 3,196,782.16
5. Step 5: Solve for x
   x = 3,196,782.16/2,652.37
6. Step 6: Final answer
   x = 1,205.25