Finding the Fourth Proportional to 564,554.27, 779,085.72 and 306,431.42

Step by Step Solution

1. Step 1: Write the proportion equation
   564,554.27 : 779,085.72 = 306,431.42 : x
2. Step 2: Convert to fraction form
   564,554.27/779,085.72 = 306,431.42/x
3. Step 3: Cross multiply
   564,554.27x = 779,085.72 × 306,431.42
4. Step 4: Simplify right side
   564,554.27x = 238,736,345,429.04
5. Step 5: Solve for x
   x = 238,736,345,429.04/564,554.27
6. Step 6: Final answer
   x = 422,875.81