Finding the Fourth Proportional to 30,977.82, 42,749.46 and 16,830.63

Step by Step Solution

1. Step 1: Write the proportion equation
   30,977.82 : 42,749.46 = 16,830.63 : x
2. Step 2: Convert to fraction form
   30,977.82/42,749.46 = 16,830.63/x
3. Step 3: Cross multiply
   30,977.82x = 42,749.46 × 16,830.63
4. Step 4: Simplify right side
   30,977.82x = 719,500,343.96
5. Step 5: Solve for x
   x = 719,500,343.96/30,977.82
6. Step 6: Final answer
   x = 23,226.31