Finding the Fourth Proportional to 142,017.13, 213,054.86 and 57,777.09

Step by Step Solution

1. Step 1: Write the proportion equation
   142,017.13 : 213,054.86 = 57,777.09 : x
2. Step 2: Convert to fraction form
   142,017.13/213,054.86 = 57,777.09/x
3. Step 3: Cross multiply
   142,017.13x = 213,054.86 × 57,777.09
4. Step 4: Simplify right side
   142,017.13x = 12,309,689,821.16
5. Step 5: Solve for x
   x = 12,309,689,821.16/142,017.13
6. Step 6: Final answer
   x = 86,677.50