Finding the Fourth Proportional to 142,407.29, 196,523.34 and 78,749.39

Step by Step Solution

1. Step 1: Write the proportion equation
   142,407.29 : 196,523.34 = 78,749.39 : x
2. Step 2: Convert to fraction form
   142,407.29/196,523.34 = 78,749.39/x
3. Step 3: Cross multiply
   142,407.29x = 196,523.34 × 78,749.39
4. Step 4: Simplify right side
   142,407.29x = 15,476,093,145.76
5. Step 5: Solve for x
   x = 15,476,093,145.76/142,407.29
6. Step 6: Final answer
   x = 108,674.87