Finding the Fourth Proportional to 108,084.29, 149,113.46 and 72,217.49

Step by Step Solution

1. Step 1: Write the proportion equation
   108,084.29 : 149,113.46 = 72,217.49 : x
2. Step 2: Convert to fraction form
   108,084.29/149,113.46 = 72,217.49/x
3. Step 3: Cross multiply
   108,084.29x = 149,113.46 × 72,217.49
4. Step 4: Simplify right side
   108,084.29x = 10,768,599,445.33
5. Step 5: Solve for x
   x = 10,768,599,445.33/108,084.29
6. Step 6: Final answer
   x = 99,631.50