Finding the Fourth Proportional to 142,477.31, 196,620.82 and 78,814.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,477.31 : 196,620.82 = 78,814.96 : x
2. Step 2: Convert to fraction form
   142,477.31/196,620.82 = 78,814.96/x
3. Step 3: Cross multiply
   142,477.31x = 196,620.82 × 78,814.96
4. Step 4: Simplify right side
   142,477.31x = 15,496,661,374.88
5. Step 5: Solve for x
   x = 15,496,661,374.88/142,477.31
6. Step 6: Final answer
   x = 108,765.82