Finding the Fourth Proportional to 30,483.72, 45,711 and 12,943.98

Step by Step Solution

1. Step 1: Write the proportion equation
   30,483.72 : 45,711 = 12,943.98 : x
2. Step 2: Convert to fraction form
   30,483.72/45,711 = 12,943.98/x
3. Step 3: Cross multiply
   30,483.72x = 45,711 × 12,943.98
4. Step 4: Simplify right side
   30,483.72x = 591,682,269.78
5. Step 5: Solve for x
   x = 591,682,269.78/30,483.72
6. Step 6: Final answer
   x = 19,409.78