Finding the Fourth Proportional to 142,007.91, 195,971.58 and 78,345.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,007.91 : 195,971.58 = 78,345.69 : x
2. Step 2: Convert to fraction form
   142,007.91/195,971.58 = 78,345.69/x
3. Step 3: Cross multiply
   142,007.91x = 195,971.58 × 78,345.69
4. Step 4: Simplify right side
   142,007.91x = 15,353,528,655.49
5. Step 5: Solve for x
   x = 15,353,528,655.49/142,007.91
6. Step 6: Final answer
   x = 108,117.42