Finding the Fourth Proportional to 140,562, 210,872.16 and 57,456

Step by Step Solution

1. Step 1: Write the proportion equation
   140,562 : 210,872.16 = 57,456 : x
2. Step 2: Convert to fraction form
   140,562/210,872.16 = 57,456/x
3. Step 3: Cross multiply
   140,562x = 210,872.16 × 57,456
4. Step 4: Simplify right side
   140,562x = 12,115,870,824.96
5. Step 5: Solve for x
   x = 12,115,870,824.96/140,562
6. Step 6: Final answer
   x = 86,195.92