Finding the Fourth Proportional to 117,429.72, 162,187.62 and 77,322.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,429.72 : 162,187.62 = 77,322.78 : x
2. Step 2: Convert to fraction form
   117,429.72/162,187.62 = 77,322.78/x
3. Step 3: Cross multiply
   117,429.72x = 162,187.62 × 77,322.78
4. Step 4: Simplify right side
   117,429.72x = 12,540,797,659.98
5. Step 5: Solve for x
   x = 12,540,797,659.98/117,429.72
6. Step 6: Final answer
   x = 106,794.07