Finding the Fourth Proportional to 111,698.84, 167,631.31 and 45,139.54

Step by Step Solution

1. Step 1: Write the proportion equation
   111,698.84 : 167,631.31 = 45,139.54 : x
2. Step 2: Convert to fraction form
   111,698.84/167,631.31 = 45,139.54/x
3. Step 3: Cross multiply
   111,698.84x = 167,631.31 × 45,139.54
4. Step 4: Simplify right side
   111,698.84x = 7,566,800,223.00
5. Step 5: Solve for x
   x = 7,566,800,223.00/111,698.84
6. Step 6: Final answer
   x = 67,742.88