Finding the Fourth Proportional to 456,196.38, 684,250.74 and 140,568.54

Step by Step Solution

1. Step 1: Write the proportion equation
   456,196.38 : 684,250.74 = 140,568.54 : x
2. Step 2: Convert to fraction form
   456,196.38/684,250.74 = 140,568.54/x
3. Step 3: Cross multiply
   456,196.38x = 684,250.74 × 140,568.54
4. Step 4: Simplify right side
   456,196.38x = 96,184,127,515.72
5. Step 5: Solve for x
   x = 96,184,127,515.72/456,196.38
6. Step 6: Final answer
   x = 210,839.30