Finding the Fourth Proportional to 142,748.69, 196,999.65 and 79,086.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,748.69 : 196,999.65 = 79,086.49 : x
2. Step 2: Convert to fraction form
   142,748.69/196,999.65 = 79,086.49/x
3. Step 3: Cross multiply
   142,748.69x = 196,999.65 × 79,086.49
4. Step 4: Simplify right side
   142,748.69x = 15,580,009,667.01
5. Step 5: Solve for x
   x = 15,580,009,667.01/142,748.69
6. Step 6: Final answer
   x = 109,142.93