Finding the Fourth Proportional to 129,782.50, 179,099.89 and 70,166.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,782.50 : 179,099.89 = 70,166.50 : x
2. Step 2: Convert to fraction form
   129,782.50/179,099.89 = 70,166.50/x
3. Step 3: Cross multiply
   129,782.50x = 179,099.89 × 70,166.50
4. Step 4: Simplify right side
   129,782.50x = 12,566,812,431.69
5. Step 5: Solve for x
   x = 12,566,812,431.69/129,782.50
6. Step 6: Final answer
   x = 96,829.79