Finding the Fourth Proportional to 50,485.13, 69,681.35 and 31,379.33

Step by Step Solution

1. Step 1: Write the proportion equation
   50,485.13 : 69,681.35 = 31,379.33 : x
2. Step 2: Convert to fraction form
   50,485.13/69,681.35 = 31,379.33/x
3. Step 3: Cross multiply
   50,485.13x = 69,681.35 × 31,379.33
4. Step 4: Simplify right side
   50,485.13x = 2,186,554,076.50
5. Step 5: Solve for x
   x = 2,186,554,076.50/50,485.13
6. Step 6: Final answer
   x = 43,310.85