Finding the Fourth Proportional to 30,870.17, 42,600.79 and 16,723.07

Step by Step Solution

1. Step 1: Write the proportion equation
   30,870.17 : 42,600.79 = 16,723.07 : x
2. Step 2: Convert to fraction form
   30,870.17/42,600.79 = 16,723.07/x
3. Step 3: Cross multiply
   30,870.17x = 42,600.79 × 16,723.07
4. Step 4: Simplify right side
   30,870.17x = 712,415,993.23
5. Step 5: Solve for x
   x = 712,415,993.23/30,870.17
6. Step 6: Final answer
   x = 23,077.81