Finding the Fourth Proportional to 142,019.08, 195,988.60 and 78,356.84

Step by Step Solution

1. Step 1: Write the proportion equation
   142,019.08 : 195,988.60 = 78,356.84 : x
2. Step 2: Convert to fraction form
   142,019.08/195,988.60 = 78,356.84/x
3. Step 3: Cross multiply
   142,019.08x = 195,988.60 × 78,356.84
4. Step 4: Simplify right side
   142,019.08x = 15,357,047,372.02
5. Step 5: Solve for x
   x = 15,357,047,372.02/142,019.08
6. Step 6: Final answer
   x = 108,133.69