Finding the Fourth Proportional to 99,540.09, 137,364.26 and 57,105.27

Step by Step Solution

1. Step 1: Write the proportion equation
   99,540.09 : 137,364.26 = 57,105.27 : x
2. Step 2: Convert to fraction form
   99,540.09/137,364.26 = 57,105.27/x
3. Step 3: Cross multiply
   99,540.09x = 137,364.26 × 57,105.27
4. Step 4: Simplify right side
   99,540.09x = 7,844,222,870.12
5. Step 5: Solve for x
   x = 7,844,222,870.12/99,540.09
6. Step 6: Final answer
   x = 78,804.66