Finding the Fourth Proportional to 30,921.88, 42,672.18 and 16,774.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,921.88 : 42,672.18 = 16,774.72 : x
2. Step 2: Convert to fraction form
   30,921.88/42,672.18 = 16,774.72/x
3. Step 3: Cross multiply
   30,921.88x = 42,672.18 × 16,774.72
4. Step 4: Simplify right side
   30,921.88x = 715,813,871.29
5. Step 5: Solve for x
   x = 715,813,871.29/30,921.88
6. Step 6: Final answer
   x = 23,149.11