Finding the Fourth Proportional to 2,012.32, 3,018.08 and 779.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.32 : 3,018.08 = 779.72 : x
2. Step 2: Convert to fraction form
   2,012.32/3,018.08 = 779.72/x
3. Step 3: Cross multiply
   2,012.32x = 3,018.08 × 779.72
4. Step 4: Simplify right side
   2,012.32x = 2,353,257.34
5. Step 5: Solve for x
   x = 2,353,257.34/2,012.32
6. Step 6: Final answer
   x = 1,169.43