Finding the Fourth Proportional to 142,097.10, 196,092.93 and 78,434.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,097.10 : 196,092.93 = 78,434.88 : x
2. Step 2: Convert to fraction form
   142,097.10/196,092.93 = 78,434.88/x
3. Step 3: Cross multiply
   142,097.10x = 196,092.93 × 78,434.88
4. Step 4: Simplify right side
   142,097.10x = 15,380,525,433.40
5. Step 5: Solve for x
   x = 15,380,525,433.40/142,097.10
6. Step 6: Final answer
   x = 108,239.54