Finding the Fourth Proportional to 111,667.89, 154,107.59 and 63,279.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,667.89 : 154,107.59 = 63,279.20 : x
2. Step 2: Convert to fraction form
   111,667.89/154,107.59 = 63,279.20/x
3. Step 3: Cross multiply
   111,667.89x = 154,107.59 × 63,279.20
4. Step 4: Simplify right side
   111,667.89x = 9,751,805,009.13
5. Step 5: Solve for x
   x = 9,751,805,009.13/111,667.89
6. Step 6: Final answer
   x = 87,328.64