Finding the Fourth Proportional to 111,128.34, 166,662.90 and 31,161.90

Step by Step Solution

1. Step 1: Write the proportion equation
   111,128.34 : 166,662.90 = 31,161.90 : x
2. Step 2: Convert to fraction form
   111,128.34/166,662.90 = 31,161.90/x
3. Step 3: Cross multiply
   111,128.34x = 166,662.90 × 31,161.90
4. Step 4: Simplify right side
   111,128.34x = 5,193,532,623.51
5. Step 5: Solve for x
   x = 5,193,532,623.51/111,128.34
6. Step 6: Final answer
   x = 46,734.55