Finding the Fourth Proportional to 43,780, 65,705.84 and 30,658.72

Step by Step Solution

1. Step 1: Write the proportion equation
   43,780 : 65,705.84 = 30,658.72 : x
2. Step 2: Convert to fraction form
   43,780/65,705.84 = 30,658.72/x
3. Step 3: Cross multiply
   43,780x = 65,705.84 × 30,658.72
4. Step 4: Simplify right side
   43,780x = 2,014,456,950.92
5. Step 5: Solve for x
   x = 2,014,456,950.92/43,780
6. Step 6: Final answer
   x = 46,013.18