Finding the Fourth Proportional to 142,327.71, 196,412.30 and 78,665.51

Step by Step Solution

1. Step 1: Write the proportion equation
   142,327.71 : 196,412.30 = 78,665.51 : x
2. Step 2: Convert to fraction form
   142,327.71/196,412.30 = 78,665.51/x
3. Step 3: Cross multiply
   142,327.71x = 196,412.30 × 78,665.51
4. Step 4: Simplify right side
   142,327.71x = 15,450,872,374.38
5. Step 5: Solve for x
   x = 15,450,872,374.38/142,327.71
6. Step 6: Final answer
   x = 108,558.43