Finding the Fourth Proportional to 142,075.76, 196,058.81 and 78,412.73

Step by Step Solution

1. Step 1: Write the proportion equation
   142,075.76 : 196,058.81 = 78,412.73 : x
2. Step 2: Convert to fraction form
   142,075.76/196,058.81 = 78,412.73/x
3. Step 3: Cross multiply
   142,075.76x = 196,058.81 × 78,412.73
4. Step 4: Simplify right side
   142,075.76x = 15,373,505,748.39
5. Step 5: Solve for x
   x = 15,373,505,748.39/142,075.76
6. Step 6: Final answer
   x = 108,206.40