Finding the Fourth Proportional to 897,238.72, 1,238,170.98 and 494,830.72

Step by Step Solution

1. Step 1: Write the proportion equation
   897,238.72 : 1,238,170.98 = 494,830.72 : x
2. Step 2: Convert to fraction form
   897,238.72/1,238,170.98 = 494,830.72/x
3. Step 3: Cross multiply
   897,238.72x = 1,238,170.98 × 494,830.72
4. Step 4: Simplify right side
   897,238.72x = 612,685,037,516.51
5. Step 5: Solve for x
   x = 612,685,037,516.51/897,238.72
6. Step 6: Final answer
   x = 682,856.22