Finding the Fourth Proportional to 142,298.08, 196,364.96 and 78,634.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,298.08 : 196,364.96 = 78,634.50 : x
2. Step 2: Convert to fraction form
   142,298.08/196,364.96 = 78,634.50/x
3. Step 3: Cross multiply
   142,298.08x = 196,364.96 × 78,634.50
4. Step 4: Simplify right side
   142,298.08x = 15,441,060,447.12
5. Step 5: Solve for x
   x = 15,441,060,447.12/142,298.08
6. Step 6: Final answer
   x = 108,512.08