Finding the Fourth Proportional to 30,875.34, 42,607.69 and 16,728.15

Step by Step Solution

1. Step 1: Write the proportion equation
   30,875.34 : 42,607.69 = 16,728.15 : x
2. Step 2: Convert to fraction form
   30,875.34/42,607.69 = 16,728.15/x
3. Step 3: Cross multiply
   30,875.34x = 42,607.69 × 16,728.15
4. Step 4: Simplify right side
   30,875.34x = 712,747,829.47
5. Step 5: Solve for x
   x = 712,747,829.47/30,875.34
6. Step 6: Final answer
   x = 23,084.70