Finding the Fourth Proportional to 30,208.60, 41,686.42 and 16,780.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,208.60 : 41,686.42 = 16,780.72 : x
2. Step 2: Convert to fraction form
   30,208.60/41,686.42 = 16,780.72/x
3. Step 3: Cross multiply
   30,208.60x = 41,686.42 × 16,780.72
4. Step 4: Simplify right side
   30,208.60x = 699,528,141.82
5. Step 5: Solve for x
   x = 699,528,141.82/30,208.60
6. Step 6: Final answer
   x = 23,156.59