Finding the Fourth Proportional to 142,554.21, 196,730.98 and 78,892.02

Step by Step Solution

1. Step 1: Write the proportion equation
   142,554.21 : 196,730.98 = 78,892.02 : x
2. Step 2: Convert to fraction form
   142,554.21/196,730.98 = 78,892.02/x
3. Step 3: Cross multiply
   142,554.21x = 196,730.98 × 78,892.02
4. Step 4: Simplify right side
   142,554.21x = 15,520,504,408.78
5. Step 5: Solve for x
   x = 15,520,504,408.78/142,554.21
6. Step 6: Final answer
   x = 108,874.40