Finding the Fourth Proportional to 30,785.56, 42,484.10 and 16,638.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,785.56 : 42,484.10 = 16,638.42 : x
2. Step 2: Convert to fraction form
   30,785.56/42,484.10 = 16,638.42/x
3. Step 3: Cross multiply
   30,785.56x = 42,484.10 × 16,638.42
4. Step 4: Simplify right side
   30,785.56x = 706,868,299.12
5. Step 5: Solve for x
   x = 706,868,299.12/30,785.56
6. Step 6: Final answer
   x = 22,961.03