Finding the Fourth Proportional to 51,894.78, 71,609.94 and 30,669.90

Step by Step Solution

1. Step 1: Write the proportion equation
   51,894.78 : 71,609.94 = 30,669.90 : x
2. Step 2: Convert to fraction form
   51,894.78/71,609.94 = 30,669.90/x
3. Step 3: Cross multiply
   51,894.78x = 71,609.94 × 30,669.90
4. Step 4: Simplify right side
   51,894.78x = 2,196,269,698.81
5. Step 5: Solve for x
   x = 2,196,269,698.81/51,894.78
6. Step 6: Final answer
   x = 42,321.59