Finding the Fourth Proportional to 142,032.72, 212,743.48 and 67,040.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,032.72 : 212,743.48 = 67,040.72 : x
2. Step 2: Convert to fraction form
   142,032.72/212,743.48 = 67,040.72/x
3. Step 3: Cross multiply
   142,032.72x = 212,743.48 × 67,040.72
4. Step 4: Simplify right side
   142,032.72x = 14,262,476,074.51
5. Step 5: Solve for x
   x = 14,262,476,074.51/142,032.72
6. Step 6: Final answer
   x = 100,416.83