Finding the Fourth Proportional to 142,796.56, 197,059.08 and 86,196.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,796.56 : 197,059.08 = 86,196.88 : x
2. Step 2: Convert to fraction form
   142,796.56/197,059.08 = 86,196.88/x
3. Step 3: Cross multiply
   142,796.56x = 197,059.08 × 86,196.88
4. Step 4: Simplify right side
   142,796.56x = 16,985,877,871.67
5. Step 5: Solve for x
   x = 16,985,877,871.67/142,796.56
6. Step 6: Final answer
   x = 118,951.59