Finding the Fourth Proportional to 142,554.58, 196,731.50 and 78,892.40

Step by Step Solution

1. Step 1: Write the proportion equation
   142,554.58 : 196,731.50 = 78,892.40 : x
2. Step 2: Convert to fraction form
   142,554.58/196,731.50 = 78,892.40/x
3. Step 3: Cross multiply
   142,554.58x = 196,731.50 × 78,892.40
4. Step 4: Simplify right side
   142,554.58x = 15,520,620,190.60
5. Step 5: Solve for x
   x = 15,520,620,190.60/142,554.58
6. Step 6: Final answer
   x = 108,874.93