Finding the Fourth Proportional to 142,577.46, 213,768.98 and 72,321.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,577.46 : 213,768.98 = 72,321.30 : x
2. Step 2: Convert to fraction form
   142,577.46/213,768.98 = 72,321.30/x
3. Step 3: Cross multiply
   142,577.46x = 213,768.98 × 72,321.30
4. Step 4: Simplify right side
   142,577.46x = 15,460,050,533.27
5. Step 5: Solve for x
   x = 15,460,050,533.27/142,577.46
6. Step 6: Final answer
   x = 108,432.64