Finding the Fourth Proportional to 30,875.79, 42,608.61 and 16,728.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,875.79 : 42,608.61 = 16,728.69 : x
2. Step 2: Convert to fraction form
   30,875.79/42,608.61 = 16,728.69/x
3. Step 3: Cross multiply
   30,875.79x = 42,608.61 × 16,728.69
4. Step 4: Simplify right side
   30,875.79x = 712,786,228.02
5. Step 5: Solve for x
   x = 712,786,228.02/30,875.79
6. Step 6: Final answer
   x = 23,085.60