Finding the Fourth Proportional to 142,077.84, 196,068.78 and 78,414.28

Step by Step Solution

1. Step 1: Write the proportion equation
   142,077.84 : 196,068.78 = 78,414.28 : x
2. Step 2: Convert to fraction form
   142,077.84/196,068.78 = 78,414.28/x
3. Step 3: Cross multiply
   142,077.84x = 196,068.78 × 78,414.28
4. Step 4: Simplify right side
   142,077.84x = 15,374,592,214.18
5. Step 5: Solve for x
   x = 15,374,592,214.18/142,077.84
6. Step 6: Final answer
   x = 108,212.46