Finding the Fourth Proportional to 108,978.67, 150,285.81 and 70,724.13

Step by Step Solution

1. Step 1: Write the proportion equation
   108,978.67 : 150,285.81 = 70,724.13 : x
2. Step 2: Convert to fraction form
   108,978.67/150,285.81 = 70,724.13/x
3. Step 3: Cross multiply
   108,978.67x = 150,285.81 × 70,724.13
4. Step 4: Simplify right side
   108,978.67x = 10,628,833,163.60
5. Step 5: Solve for x
   x = 10,628,833,163.60/108,978.67
6. Step 6: Final answer
   x = 97,531.32