Finding the Fourth Proportional to 142,618.48, 196,806 and 78,075.35

Step by Step Solution

1. Step 1: Write the proportion equation
   142,618.48 : 196,806 = 78,075.35 : x
2. Step 2: Convert to fraction form
   142,618.48/196,806 = 78,075.35/x
3. Step 3: Cross multiply
   142,618.48x = 196,806 × 78,075.35
4. Step 4: Simplify right side
   142,618.48x = 15,365,697,332.10
5. Step 5: Solve for x
   x = 15,365,697,332.10/142,618.48
6. Step 6: Final answer
   x = 107,739.88