Finding the Fourth Proportional to 142,699.98, 196,927.40 and 86,100.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,699.98 : 196,927.40 = 86,100.42 : x
2. Step 2: Convert to fraction form
   142,699.98/196,927.40 = 86,100.42/x
3. Step 3: Cross multiply
   142,699.98x = 196,927.40 × 86,100.42
4. Step 4: Simplify right side
   142,699.98x = 16,955,531,849.51
5. Step 5: Solve for x
   x = 16,955,531,849.51/142,699.98
6. Step 6: Final answer
   x = 118,819.44