Finding the Fourth Proportional to 142,018.16, 195,985.04 and 78,356.08

Step by Step Solution

1. Step 1: Write the proportion equation
   142,018.16 : 195,985.04 = 78,356.08 : x
2. Step 2: Convert to fraction form
   142,018.16/195,985.04 = 78,356.08/x
3. Step 3: Cross multiply
   142,018.16x = 195,985.04 × 78,356.08
4. Step 4: Simplify right side
   142,018.16x = 15,356,619,473.04
5. Step 5: Solve for x
   x = 15,356,619,473.04/142,018.16
6. Step 6: Final answer
   x = 108,131.38