Finding the Fourth Proportional to 142,308.56, 196,384.20 and 78,646.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,308.56 : 196,384.20 = 78,646.34 : x
2. Step 2: Convert to fraction form
   142,308.56/196,384.20 = 78,646.34/x
3. Step 3: Cross multiply
   142,308.56x = 196,384.20 × 78,646.34
4. Step 4: Simplify right side
   142,308.56x = 15,444,898,563.83
5. Step 5: Solve for x
   x = 15,444,898,563.83/142,308.56
6. Step 6: Final answer
   x = 108,531.06