Finding the Fourth Proportional to 111,960.50, 154,510.48 and 66,021.98

Step by Step Solution

1. Step 1: Write the proportion equation
   111,960.50 : 154,510.48 = 66,021.98 : x
2. Step 2: Convert to fraction form
   111,960.50/154,510.48 = 66,021.98/x
3. Step 3: Cross multiply
   111,960.50x = 154,510.48 × 66,021.98
4. Step 4: Simplify right side
   111,960.50x = 10,201,087,820.35
5. Step 5: Solve for x
   x = 10,201,087,820.35/111,960.50
6. Step 6: Final answer
   x = 91,113.27