Finding the Fourth Proportional to 142,581.79, 196,742.27 and 78,919.43

Step by Step Solution

1. Step 1: Write the proportion equation
   142,581.79 : 196,742.27 = 78,919.43 : x
2. Step 2: Convert to fraction form
   142,581.79/196,742.27 = 78,919.43/x
3. Step 3: Cross multiply
   142,581.79x = 196,742.27 × 78,919.43
4. Step 4: Simplify right side
   142,581.79x = 15,526,788,494.46
5. Step 5: Solve for x
   x = 15,526,788,494.46/142,581.79
6. Step 6: Final answer
   x = 108,897.42