Finding the Fourth Proportional to 51,570.27, 71,145.69 and 31,419.78

Step by Step Solution

1. Step 1: Write the proportion equation
   51,570.27 : 71,145.69 = 31,419.78 : x
2. Step 2: Convert to fraction form
   51,570.27/71,145.69 = 31,419.78/x
3. Step 3: Cross multiply
   51,570.27x = 71,145.69 × 31,419.78
4. Step 4: Simplify right side
   51,570.27x = 2,235,381,927.75
5. Step 5: Solve for x
   x = 2,235,381,927.75/51,570.27
6. Step 6: Final answer
   x = 43,346.33