Finding the Fourth Proportional to 142,049.84, 196,039.86 and 81,641.57

Step by Step Solution

1. Step 1: Write the proportion equation
   142,049.84 : 196,039.86 = 81,641.57 : x
2. Step 2: Convert to fraction form
   142,049.84/196,039.86 = 81,641.57/x
3. Step 3: Cross multiply
   142,049.84x = 196,039.86 × 81,641.57
4. Step 4: Simplify right side
   142,049.84x = 16,005,001,952.98
5. Step 5: Solve for x
   x = 16,005,001,952.98/142,049.84
6. Step 6: Final answer
   x = 112,671.74