Finding the Fourth Proportional to 122,019.77, 168,300.48 and 111,980.63

Step by Step Solution

1. Step 1: Write the proportion equation
   122,019.77 : 168,300.48 = 111,980.63 : x
2. Step 2: Convert to fraction form
   122,019.77/168,300.48 = 111,980.63/x
3. Step 3: Cross multiply
   122,019.77x = 168,300.48 × 111,980.63
4. Step 4: Simplify right side
   122,019.77x = 18,846,392,378.30
5. Step 5: Solve for x
   x = 18,846,392,378.30/122,019.77
6. Step 6: Final answer
   x = 154,453.60