Finding the Fourth Proportional to 30,834.72, 46,211.76 and 12,345.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,834.72 : 46,211.76 = 12,345.12 : x
2. Step 2: Convert to fraction form
   30,834.72/46,211.76 = 12,345.12/x
3. Step 3: Cross multiply
   30,834.72x = 46,211.76 × 12,345.12
4. Step 4: Simplify right side
   30,834.72x = 570,489,722.61
5. Step 5: Solve for x
   x = 570,489,722.61/30,834.72
6. Step 6: Final answer
   x = 18,501.54