Finding the Fourth Proportional to 30,781.62, 42,478.83 and 16,634.43

Step by Step Solution

1. Step 1: Write the proportion equation
   30,781.62 : 42,478.83 = 16,634.43 : x
2. Step 2: Convert to fraction form
   30,781.62/42,478.83 = 16,634.43/x
3. Step 3: Cross multiply
   30,781.62x = 42,478.83 × 16,634.43
4. Step 4: Simplify right side
   30,781.62x = 706,611,124.12
5. Step 5: Solve for x
   x = 706,611,124.12/30,781.62
6. Step 6: Final answer
   x = 22,955.62