Finding the Fourth Proportional to 142,116.06, 196,111.68 and 78,450.06

Step by Step Solution

1. Step 1: Write the proportion equation
   142,116.06 : 196,111.68 = 78,450.06 : x
2. Step 2: Convert to fraction form
   142,116.06/196,111.68 = 78,450.06/x
3. Step 3: Cross multiply
   142,116.06x = 196,111.68 × 78,450.06
4. Step 4: Simplify right side
   142,116.06x = 15,384,973,062.70
5. Step 5: Solve for x
   x = 15,384,973,062.70/142,116.06
6. Step 6: Final answer
   x = 108,256.40