Finding the Fourth Proportional to 128,016.39, 191,942.37 and 53,188.23

Step by Step Solution

1. Step 1: Write the proportion equation
   128,016.39 : 191,942.37 = 53,188.23 : x
2. Step 2: Convert to fraction form
   128,016.39/191,942.37 = 53,188.23/x
3. Step 3: Cross multiply
   128,016.39x = 191,942.37 × 53,188.23
4. Step 4: Simplify right side
   128,016.39x = 10,209,074,922.31
5. Step 5: Solve for x
   x = 10,209,074,922.31/128,016.39
6. Step 6: Final answer
   x = 79,748.19