Finding the Fourth Proportional to 30,912.63, 42,659.42 and 16,765.57

Step by Step Solution

1. Step 1: Write the proportion equation
   30,912.63 : 42,659.42 = 16,765.57 : x
2. Step 2: Convert to fraction form
   30,912.63/42,659.42 = 16,765.57/x
3. Step 3: Cross multiply
   30,912.63x = 42,659.42 × 16,765.57
4. Step 4: Simplify right side
   30,912.63x = 715,209,492.17
5. Step 5: Solve for x
   x = 715,209,492.17/30,912.63
6. Step 6: Final answer
   x = 23,136.48