Finding the Fourth Proportional to 113,382.23, 156,457.31 and 65,638.80

Step by Step Solution

1. Step 1: Write the proportion equation
   113,382.23 : 156,457.31 = 65,638.80 : x
2. Step 2: Convert to fraction form
   113,382.23/156,457.31 = 65,638.80/x
3. Step 3: Cross multiply
   113,382.23x = 156,457.31 × 65,638.80
4. Step 4: Simplify right side
   113,382.23x = 10,269,669,751.43
5. Step 5: Solve for x
   x = 10,269,669,751.43/113,382.23
6. Step 6: Final answer
   x = 90,575.66