Finding the Fourth Proportional to 493,968, 681,687.72 and 302,870.64

Step by Step Solution

1. Step 1: Write the proportion equation
   493,968 : 681,687.72 = 302,870.64 : x
2. Step 2: Convert to fraction form
   493,968/681,687.72 = 302,870.64/x
3. Step 3: Cross multiply
   493,968x = 681,687.72 × 302,870.64
4. Step 4: Simplify right side
   493,968x = 206,463,196,036.54
5. Step 5: Solve for x
   x = 206,463,196,036.54/493,968
6. Step 6: Final answer
   x = 417,968.77