Finding the Fourth Proportional to 142,653.09, 196,858.86 and 78,989.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,653.09 : 196,858.86 = 78,989.52 : x
2. Step 2: Convert to fraction form
   142,653.09/196,858.86 = 78,989.52/x
3. Step 3: Cross multiply
   142,653.09x = 196,858.86 × 78,989.52
4. Step 4: Simplify right side
   142,653.09x = 15,549,786,859.15
5. Step 5: Solve for x
   x = 15,549,786,859.15/142,653.09
6. Step 6: Final answer
   x = 109,004.21