Finding the Fourth Proportional to 113,756.28, 156,771.09 and 81,869.82

Step by Step Solution

1. Step 1: Write the proportion equation
   113,756.28 : 156,771.09 = 81,869.82 : x
2. Step 2: Convert to fraction form
   113,756.28/156,771.09 = 81,869.82/x
3. Step 3: Cross multiply
   113,756.28x = 156,771.09 × 81,869.82
4. Step 4: Simplify right side
   113,756.28x = 12,834,820,919.50
5. Step 5: Solve for x
   x = 12,834,820,919.50/113,756.28
6. Step 6: Final answer
   x = 112,827.36