Finding the Fourth Proportional to 142,758.94, 214,141.85 and 47,990.36

Step by Step Solution

1. Step 1: Write the proportion equation
   142,758.94 : 214,141.85 = 47,990.36 : x
2. Step 2: Convert to fraction form
   142,758.94/214,141.85 = 47,990.36/x
3. Step 3: Cross multiply
   142,758.94x = 214,141.85 × 47,990.36
4. Step 4: Simplify right side
   142,758.94x = 10,276,743,521.83
5. Step 5: Solve for x
   x = 10,276,743,521.83/142,758.94
6. Step 6: Final answer
   x = 71,986.69