Finding the Fourth Proportional to 30,905.88, 42,649.98 and 16,758.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,905.88 : 42,649.98 = 16,758.72 : x
2. Step 2: Convert to fraction form
   30,905.88/42,649.98 = 16,758.72/x
3. Step 3: Cross multiply
   30,905.88x = 42,649.98 × 16,758.72
4. Step 4: Simplify right side
   30,905.88x = 714,759,072.83
5. Step 5: Solve for x
   x = 714,759,072.83/30,905.88
6. Step 6: Final answer
   x = 23,126.96