Finding the Fourth Proportional to 102,960.76, 142,057.72 and 70,705.08

Step by Step Solution

1. Step 1: Write the proportion equation
   102,960.76 : 142,057.72 = 70,705.08 : x
2. Step 2: Convert to fraction form
   102,960.76/142,057.72 = 70,705.08/x
3. Step 3: Cross multiply
   102,960.76x = 142,057.72 × 70,705.08
4. Step 4: Simplify right side
   102,960.76x = 10,044,202,457.22
5. Step 5: Solve for x
   x = 10,044,202,457.22/102,960.76
6. Step 6: Final answer
   x = 97,553.69