Finding the Fourth Proportional to 111,561.75, 153,939.72 and 65,623.48

Step by Step Solution

1. Step 1: Write the proportion equation
   111,561.75 : 153,939.72 = 65,623.48 : x
2. Step 2: Convert to fraction form
   111,561.75/153,939.72 = 65,623.48/x
3. Step 3: Cross multiply
   111,561.75x = 153,939.72 × 65,623.48
4. Step 4: Simplify right side
   111,561.75x = 10,102,060,136.63
5. Step 5: Solve for x
   x = 10,102,060,136.63/111,561.75
6. Step 6: Final answer
   x = 90,551.29