Finding the Fourth Proportional to 142,840, 214,392.32 and 72,771.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,840 : 214,392.32 = 72,771.52 : x
2. Step 2: Convert to fraction form
   142,840/214,392.32 = 72,771.52/x
3. Step 3: Cross multiply
   142,840x = 214,392.32 × 72,771.52
4. Step 4: Simplify right side
   142,840x = 15,601,655,002.73
5. Step 5: Solve for x
   x = 15,601,655,002.73/142,840
6. Step 6: Final answer
   x = 109,224.69