Finding the Fourth Proportional to 113,662.88, 156,908.57 and 65,898.80

Step by Step Solution

1. Step 1: Write the proportion equation
   113,662.88 : 156,908.57 = 65,898.80 : x
2. Step 2: Convert to fraction form
   113,662.88/156,908.57 = 65,898.80/x
3. Step 3: Cross multiply
   113,662.88x = 156,908.57 × 65,898.80
4. Step 4: Simplify right side
   113,662.88x = 10,340,085,605.80
5. Step 5: Solve for x
   x = 10,340,085,605.80/113,662.88
6. Step 6: Final answer
   x = 90,971.53