Finding the Fourth Proportional to 122,298.60, 168,700.57 and 76,904.72

Step by Step Solution

1. Step 1: Write the proportion equation
   122,298.60 : 168,700.57 = 76,904.72 : x
2. Step 2: Convert to fraction form
   122,298.60/168,700.57 = 76,904.72/x
3. Step 3: Cross multiply
   122,298.60x = 168,700.57 × 76,904.72
4. Step 4: Simplify right side
   122,298.60x = 12,973,870,099.69
5. Step 5: Solve for x
   x = 12,973,870,099.69/122,298.60
6. Step 6: Final answer
   x = 106,083.55