Finding the Fourth Proportional to 12,961.96, 19,443.24 and 4,642.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,961.96 : 19,443.24 = 4,642.54 : x
2. Step 2: Convert to fraction form
   12,961.96/19,443.24 = 4,642.54/x
3. Step 3: Cross multiply
   12,961.96x = 19,443.24 × 4,642.54
4. Step 4: Simplify right side
   12,961.96x = 90,266,019.43
5. Step 5: Solve for x
   x = 90,266,019.43/12,961.96
6. Step 6: Final answer
   x = 6,963.92