Finding the Fourth Proportional to 30,520.12, 42,112.90 and 17,091.94

Step by Step Solution

1. Step 1: Write the proportion equation
   30,520.12 : 42,112.90 = 17,091.94 : x
2. Step 2: Convert to fraction form
   30,520.12/42,112.90 = 17,091.94/x
3. Step 3: Cross multiply
   30,520.12x = 42,112.90 × 17,091.94
4. Step 4: Simplify right side
   30,520.12x = 719,791,160.03
5. Step 5: Solve for x
   x = 719,791,160.03/30,520.12
6. Step 6: Final answer
   x = 23,584.15