Finding the Fourth Proportional to 469,245, 646,841.52 and 287,620.32

Step by Step Solution

1. Step 1: Write the proportion equation
   469,245 : 646,841.52 = 287,620.32 : x
2. Step 2: Convert to fraction form
   469,245/646,841.52 = 287,620.32/x
3. Step 3: Cross multiply
   469,245x = 646,841.52 × 287,620.32
4. Step 4: Simplify right side
   469,245x = 186,044,764,971.69
5. Step 5: Solve for x
   x = 186,044,764,971.69/469,245
6. Step 6: Final answer
   x = 396,476.82