Finding the Fourth Proportional to 123,580.69, 170,376.41 and 98,171.39

Step by Step Solution

1. Step 1: Write the proportion equation
   123,580.69 : 170,376.41 = 98,171.39 : x
2. Step 2: Convert to fraction form
   123,580.69/170,376.41 = 98,171.39/x
3. Step 3: Cross multiply
   123,580.69x = 170,376.41 × 98,171.39
4. Step 4: Simplify right side
   123,580.69x = 16,726,089,664.28
5. Step 5: Solve for x
   x = 16,726,089,664.28/123,580.69
6. Step 6: Final answer
   x = 135,345.50