Finding the Fourth Proportional to 122,498.16, 168,924.60 and 115,836.72

Step by Step Solution

1. Step 1: Write the proportion equation
   122,498.16 : 168,924.60 = 115,836.72 : x
2. Step 2: Convert to fraction form
   122,498.16/168,924.60 = 115,836.72/x
3. Step 3: Cross multiply
   122,498.16x = 168,924.60 × 115,836.72
4. Step 4: Simplify right side
   122,498.16x = 19,567,671,591.31
5. Step 5: Solve for x
   x = 19,567,671,591.31/122,498.16
6. Step 6: Final answer
   x = 159,738.49