Finding the Fourth Proportional to 140,563.50, 210,874.41 and 57,457.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,563.50 : 210,874.41 = 57,457.50 : x
2. Step 2: Convert to fraction form
   140,563.50/210,874.41 = 57,457.50/x
3. Step 3: Cross multiply
   140,563.50x = 210,874.41 × 57,457.50
4. Step 4: Simplify right side
   140,563.50x = 12,116,316,412.58
5. Step 5: Solve for x
   x = 12,116,316,412.58/140,563.50
6. Step 6: Final answer
   x = 86,198.17