Finding the Fourth Proportional to 129,488.37, 194,411.43 and 89,413.31

Step by Step Solution

1. Step 1: Write the proportion equation
   129,488.37 : 194,411.43 = 89,413.31 : x
2. Step 2: Convert to fraction form
   129,488.37/194,411.43 = 89,413.31/x
3. Step 3: Cross multiply
   129,488.37x = 194,411.43 × 89,413.31
4. Step 4: Simplify right side
   129,488.37x = 17,382,968,486.08
5. Step 5: Solve for x
   x = 17,382,968,486.08/129,488.37
6. Step 6: Final answer
   x = 134,243.47