Finding the Fourth Proportional to 30,768.68, 42,460.80 and 16,621.52

Step by Step Solution

1. Step 1: Write the proportion equation
   30,768.68 : 42,460.80 = 16,621.52 : x
2. Step 2: Convert to fraction form
   30,768.68/42,460.80 = 16,621.52/x
3. Step 3: Cross multiply
   30,768.68x = 42,460.80 × 16,621.52
4. Step 4: Simplify right side
   30,768.68x = 705,763,036.42
5. Step 5: Solve for x
   x = 705,763,036.42/30,768.68
6. Step 6: Final answer
   x = 22,937.71