Finding the Fourth Proportional to 30,875.25, 42,607.89 and 16,728.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,875.25 : 42,607.89 = 16,728.10 : x
2. Step 2: Convert to fraction form
   30,875.25/42,607.89 = 16,728.10/x
3. Step 3: Cross multiply
   30,875.25x = 42,607.89 × 16,728.10
4. Step 4: Simplify right side
   30,875.25x = 712,749,044.71
5. Step 5: Solve for x
   x = 712,749,044.71/30,875.25
6. Step 6: Final answer
   x = 23,084.80