Finding the Fourth Proportional to 111,147.90, 166,715.91 and 31,191.30

Step by Step Solution

1. Step 1: Write the proportion equation
   111,147.90 : 166,715.91 = 31,191.30 : x
2. Step 2: Convert to fraction form
   111,147.90/166,715.91 = 31,191.30/x
3. Step 3: Cross multiply
   111,147.90x = 166,715.91 × 31,191.30
4. Step 4: Simplify right side
   111,147.90x = 5,200,085,963.58
5. Step 5: Solve for x
   x = 5,200,085,963.58/111,147.90
6. Step 6: Final answer
   x = 46,785.28