Finding the Fourth Proportional to 142,302.06, 196,375.23 and 78,639.84

Step by Step Solution

1. Step 1: Write the proportion equation
   142,302.06 : 196,375.23 = 78,639.84 : x
2. Step 2: Convert to fraction form
   142,302.06/196,375.23 = 78,639.84/x
3. Step 3: Cross multiply
   142,302.06x = 196,375.23 × 78,639.84
4. Step 4: Simplify right side
   142,302.06x = 15,442,916,667.16
5. Step 5: Solve for x
   x = 15,442,916,667.16/142,302.06
6. Step 6: Final answer
   x = 108,522.09