Finding the Fourth Proportional to 142,685.04, 196,907.76 and 78,153.36

Step by Step Solution

1. Step 1: Write the proportion equation
   142,685.04 : 196,907.76 = 78,153.36 : x
2. Step 2: Convert to fraction form
   142,685.04/196,907.76 = 78,153.36/x
3. Step 3: Cross multiply
   142,685.04x = 196,907.76 × 78,153.36
4. Step 4: Simplify right side
   142,685.04x = 15,389,002,315.67
5. Step 5: Solve for x
   x = 15,389,002,315.67/142,685.04
6. Step 6: Final answer
   x = 107,852.95