Finding the Fourth Proportional to 142,334.16, 196,408.32 and 81,888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,334.16 : 196,408.32 = 81,888.72 : x
2. Step 2: Convert to fraction form
   142,334.16/196,408.32 = 81,888.72/x
3. Step 3: Cross multiply
   142,334.16x = 196,408.32 × 81,888.72
4. Step 4: Simplify right side
   142,334.16x = 16,083,625,922.15
5. Step 5: Solve for x
   x = 16,083,625,922.15/142,334.16
6. Step 6: Final answer
   x = 112,999.06