Finding the Fourth Proportional to 30,454.72, 45,705.16 and 12,936.84

Step by Step Solution

1. Step 1: Write the proportion equation
   30,454.72 : 45,705.16 = 12,936.84 : x
2. Step 2: Convert to fraction form
   30,454.72/45,705.16 = 12,936.84/x
3. Step 3: Cross multiply
   30,454.72x = 45,705.16 × 12,936.84
4. Step 4: Simplify right side
   30,454.72x = 591,280,342.09
5. Step 5: Solve for x
   x = 591,280,342.09/30,454.72
6. Step 6: Final answer
   x = 19,415.06