Finding the Fourth Proportional to 142,124.12, 213,123.77 and 53,315.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,124.12 : 213,123.77 = 53,315.34 : x
2. Step 2: Convert to fraction form
   142,124.12/213,123.77 = 53,315.34/x
3. Step 3: Cross multiply
   142,124.12x = 213,123.77 × 53,315.34
4. Step 4: Simplify right side
   142,124.12x = 11,362,765,993.06
5. Step 5: Solve for x
   x = 11,362,765,993.06/142,124.12
6. Step 6: Final answer
   x = 79,949.60