Finding the Fourth Proportional to 142,656.96, 196,866.56 and 78,994.74

Step by Step Solution

1. Step 1: Write the proportion equation
   142,656.96 : 196,866.56 = 78,994.74 : x
2. Step 2: Convert to fraction form
   142,656.96/196,866.56 = 78,994.74/x
3. Step 3: Cross multiply
   142,656.96x = 196,866.56 × 78,994.74
4. Step 4: Simplify right side
   142,656.96x = 15,551,422,721.89
5. Step 5: Solve for x
   x = 15,551,422,721.89/142,656.96
6. Step 6: Final answer
   x = 109,012.72