Finding the Fourth Proportional to 409,085.30, 564,616.59 and 248,028.56

Step by Step Solution

1. Step 1: Write the proportion equation
   409,085.30 : 564,616.59 = 248,028.56 : x
2. Step 2: Convert to fraction form
   409,085.30/564,616.59 = 248,028.56/x
3. Step 3: Cross multiply
   409,085.30x = 564,616.59 × 248,028.56
4. Step 4: Simplify right side
   409,085.30x = 140,041,039,769.81
5. Step 5: Solve for x
   x = 140,041,039,769.81/409,085.30
6. Step 6: Final answer
   x = 342,327.24