Finding the Fourth Proportional to 140,155.50, 210,303.42 and 64,245.75

Step by Step Solution

1. Step 1: Write the proportion equation
   140,155.50 : 210,303.42 = 64,245.75 : x
2. Step 2: Convert to fraction form
   140,155.50/210,303.42 = 64,245.75/x
3. Step 3: Cross multiply
   140,155.50x = 210,303.42 × 64,245.75
4. Step 4: Simplify right side
   140,155.50x = 13,511,100,945.47
5. Step 5: Solve for x
   x = 13,511,100,945.47/140,155.50
6. Step 6: Final answer
   x = 96,400.79