Finding the Fourth Proportional to 142,051.34, 196,041.94 and 81,643.08

Step by Step Solution

1. Step 1: Write the proportion equation
   142,051.34 : 196,041.94 = 81,643.08 : x
2. Step 2: Convert to fraction form
   142,051.34/196,041.94 = 81,643.08/x
3. Step 3: Cross multiply
   142,051.34x = 196,041.94 × 81,643.08
4. Step 4: Simplify right side
   142,051.34x = 16,005,467,790.78
5. Step 5: Solve for x
   x = 16,005,467,790.78/142,051.34
6. Step 6: Final answer
   x = 112,673.82