Finding the Fourth Proportional to 243,311.79, 335,779.86 and 139,945.82

Step by Step Solution

1. Step 1: Write the proportion equation
   243,311.79 : 335,779.86 = 139,945.82 : x
2. Step 2: Convert to fraction form
   243,311.79/335,779.86 = 139,945.82/x
3. Step 3: Cross multiply
   243,311.79x = 335,779.86 × 139,945.82
4. Step 4: Simplify right side
   243,311.79x = 46,990,986,168.29
5. Step 5: Solve for x
   x = 46,990,986,168.29/243,311.79
6. Step 6: Final answer
   x = 193,130.74