Finding the Fourth Proportional to 102,091.50, 140,886.27 and 57,379.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,091.50 : 140,886.27 = 57,379.50 : x
2. Step 2: Convert to fraction form
   102,091.50/140,886.27 = 57,379.50/x
3. Step 3: Cross multiply
   102,091.50x = 140,886.27 × 57,379.50
4. Step 4: Simplify right side
   102,091.50x = 8,083,983,729.47
5. Step 5: Solve for x
   x = 8,083,983,729.47/102,091.50
6. Step 6: Final answer
   x = 79,183.71