Finding the Fourth Proportional to 142,796.49, 197,061.69 and 78,261.45

Step by Step Solution

1. Step 1: Write the proportion equation
   142,796.49 : 197,061.69 = 78,261.45 : x
2. Step 2: Convert to fraction form
   142,796.49/197,061.69 = 78,261.45/x
3. Step 3: Cross multiply
   142,796.49x = 197,061.69 × 78,261.45
4. Step 4: Simplify right side
   142,796.49x = 15,422,333,598.85
5. Step 5: Solve for x
   x = 15,422,333,598.85/142,796.49
6. Step 6: Final answer
   x = 108,002.19