Finding the Fourth Proportional to 142,978.68, 214,328.57 and 68,078.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,978.68 : 214,328.57 = 68,078.70 : x
2. Step 2: Convert to fraction form
   142,978.68/214,328.57 = 68,078.70/x
3. Step 3: Cross multiply
   142,978.68x = 214,328.57 × 68,078.70
4. Step 4: Simplify right side
   142,978.68x = 14,591,210,078.07
5. Step 5: Solve for x
   x = 14,591,210,078.07/142,978.68
6. Step 6: Final answer
   x = 102,051.65