Finding the Fourth Proportional to 111,392.37, 167,098.38 and 31,431.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111,392.37 : 167,098.38 = 31,431.05 : x
2. Step 2: Convert to fraction form
   111,392.37/167,098.38 = 31,431.05/x
3. Step 3: Cross multiply
   111,392.37x = 167,098.38 × 31,431.05
4. Step 4: Simplify right side
   111,392.37x = 5,252,077,536.70
5. Step 5: Solve for x
   x = 5,252,077,536.70/111,392.37
6. Step 6: Final answer
   x = 47,149.35