Finding the Fourth Proportional to 121,221.40, 181,769.82 and 65,108.72

Step by Step Solution

1. Step 1: Write the proportion equation
   121,221.40 : 181,769.82 = 65,108.72 : x
2. Step 2: Convert to fraction form
   121,221.40/181,769.82 = 65,108.72/x
3. Step 3: Cross multiply
   121,221.40x = 181,769.82 × 65,108.72
4. Step 4: Simplify right side
   121,221.40x = 11,834,800,314.83
5. Step 5: Solve for x
   x = 11,834,800,314.83/121,221.40
6. Step 6: Final answer
   x = 97,629.63