Finding the Fourth Proportional to 30,820.10, 42,531.78 and 16,672.94

Step by Step Solution

1. Step 1: Write the proportion equation
   30,820.10 : 42,531.78 = 16,672.94 : x
2. Step 2: Convert to fraction form
   30,820.10/42,531.78 = 16,672.94/x
3. Step 3: Cross multiply
   30,820.10x = 42,531.78 × 16,672.94
4. Step 4: Simplify right side
   30,820.10x = 709,129,825.39
5. Step 5: Solve for x
   x = 709,129,825.39/30,820.10
6. Step 6: Final answer
   x = 23,008.68