Finding the Fourth Proportional to 128,081.71, 191,991.30 and 53,245.27

Step by Step Solution

1. Step 1: Write the proportion equation
   128,081.71 : 191,991.30 = 53,245.27 : x
2. Step 2: Convert to fraction form
   128,081.71/191,991.30 = 53,245.27/x
3. Step 3: Cross multiply
   128,081.71x = 191,991.30 × 53,245.27
4. Step 4: Simplify right side
   128,081.71x = 10,222,628,606.15
5. Step 5: Solve for x
   x = 10,222,628,606.15/128,081.71
6. Step 6: Final answer
   x = 79,813.34