Finding the Fourth Proportional to 1,978.72, 2,965.52 and 807.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.72 : 2,965.52 = 807.37 : x
2. Step 2: Convert to fraction form
   1,978.72/2,965.52 = 807.37/x
3. Step 3: Cross multiply
   1,978.72x = 2,965.52 × 807.37
4. Step 4: Simplify right side
   1,978.72x = 2,394,271.88
5. Step 5: Solve for x
   x = 2,394,271.88/1,978.72
6. Step 6: Final answer
   x = 1,210.01