Finding the Fourth Proportional to 142,050.72, 196,063.55 and 81,656.40

Step by Step Solution

1. Step 1: Write the proportion equation
   142,050.72 : 196,063.55 = 81,656.40 : x
2. Step 2: Convert to fraction form
   142,050.72/196,063.55 = 81,656.40/x
3. Step 3: Cross multiply
   142,050.72x = 196,063.55 × 81,656.40
4. Step 4: Simplify right side
   142,050.72x = 16,009,843,664.22
5. Step 5: Solve for x
   x = 16,009,843,664.22/142,050.72
6. Step 6: Final answer
   x = 112,705.12