Finding the Fourth Proportional to 116,105.40, 173,898.90 and 89,724.60

Step by Step Solution

1. Step 1: Write the proportion equation
   116,105.40 : 173,898.90 = 89,724.60 : x
2. Step 2: Convert to fraction form
   116,105.40/173,898.90 = 89,724.60/x
3. Step 3: Cross multiply
   116,105.40x = 173,898.90 × 89,724.60
4. Step 4: Simplify right side
   116,105.40x = 15,603,009,242.94
5. Step 5: Solve for x
   x = 15,603,009,242.94/116,105.40
6. Step 6: Final answer
   x = 134,386.59