Finding the Fourth Proportional to 133,419.69, 199,866.54 and 108,487.89

Step by Step Solution

1. Step 1: Write the proportion equation
   133,419.69 : 199,866.54 = 108,487.89 : x
2. Step 2: Convert to fraction form
   133,419.69/199,866.54 = 108,487.89/x
3. Step 3: Cross multiply
   133,419.69x = 199,866.54 × 108,487.89
4. Step 4: Simplify right side
   133,419.69x = 21,683,099,206.20
5. Step 5: Solve for x
   x = 21,683,099,206.20/133,419.69
6. Step 6: Final answer
   x = 162,517.99