Finding the Fourth Proportional to 257,426.72, 385,960.84 and 113,262.72

Step by Step Solution

1. Step 1: Write the proportion equation
   257,426.72 : 385,960.84 = 113,262.72 : x
2. Step 2: Convert to fraction form
   257,426.72/385,960.84 = 113,262.72/x
3. Step 3: Cross multiply
   257,426.72x = 385,960.84 × 113,262.72
4. Step 4: Simplify right side
   257,426.72x = 43,714,974,551.88
5. Step 5: Solve for x
   x = 43,714,974,551.88/257,426.72
6. Step 6: Final answer
   x = 169,815.22