Finding the Fourth Proportional to 142,504.12, 196,648.50 and 77,971.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,504.12 : 196,648.50 = 77,971.96 : x
2. Step 2: Convert to fraction form
   142,504.12/196,648.50 = 77,971.96/x
3. Step 3: Cross multiply
   142,504.12x = 196,648.50 × 77,971.96
4. Step 4: Simplify right side
   142,504.12x = 15,333,068,976.06
5. Step 5: Solve for x
   x = 15,333,068,976.06/142,504.12
6. Step 6: Final answer
   x = 107,597.37