Finding the Fourth Proportional to 143,020.89, 214,490.43 and 57,631.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,020.89 : 214,490.43 = 57,631.50 : x
2. Step 2: Convert to fraction form
   143,020.89/214,490.43 = 57,631.50/x
3. Step 3: Cross multiply
   143,020.89x = 214,490.43 × 57,631.50
4. Step 4: Simplify right side
   143,020.89x = 12,361,405,216.55
5. Step 5: Solve for x
   x = 12,361,405,216.55/143,020.89
6. Step 6: Final answer
   x = 86,430.77