Finding the Fourth Proportional to 91,131.38, 136,729.88 and 31,976.27

Step by Step Solution

1. Step 1: Write the proportion equation
   91,131.38 : 136,729.88 = 31,976.27 : x
2. Step 2: Convert to fraction form
   91,131.38/136,729.88 = 31,976.27/x
3. Step 3: Cross multiply
   91,131.38x = 136,729.88 × 31,976.27
4. Step 4: Simplify right side
   91,131.38x = 4,372,111,559.95
5. Step 5: Solve for x
   x = 4,372,111,559.95/91,131.38
6. Step 6: Final answer
   x = 47,975.92