Finding the Fourth Proportional to 34,145.57, 51,171.91 and 20,112.05

Step by Step Solution

1. Step 1: Write the proportion equation
   34,145.57 : 51,171.91 = 20,112.05 : x
2. Step 2: Convert to fraction form
   34,145.57/51,171.91 = 20,112.05/x
3. Step 3: Cross multiply
   34,145.57x = 51,171.91 × 20,112.05
4. Step 4: Simplify right side
   34,145.57x = 1,029,172,012.52
5. Step 5: Solve for x
   x = 1,029,172,012.52/34,145.57
6. Step 6: Final answer
   x = 30,140.72