Finding the Fourth Proportional to 142,805.69, 197,071.85 and 79,147.59

Step by Step Solution

1. Step 1: Write the proportion equation
   142,805.69 : 197,071.85 = 79,147.59 : x
2. Step 2: Convert to fraction form
   142,805.69/197,071.85 = 79,147.59/x
3. Step 3: Cross multiply
   142,805.69x = 197,071.85 × 79,147.59
4. Step 4: Simplify right side
   142,805.69x = 15,597,761,984.34
5. Step 5: Solve for x
   x = 15,597,761,984.34/142,805.69
6. Step 6: Final answer
   x = 109,223.67