Finding the Fourth Proportional to 111,731.67, 154,173.66 and 65,763.99

Step by Step Solution

1. Step 1: Write the proportion equation
   111,731.67 : 154,173.66 = 65,763.99 : x
2. Step 2: Convert to fraction form
   111,731.67/154,173.66 = 65,763.99/x
3. Step 3: Cross multiply
   111,731.67x = 154,173.66 × 65,763.99
4. Step 4: Simplify right side
   111,731.67x = 10,139,075,034.50
5. Step 5: Solve for x
   x = 10,139,075,034.50/111,731.67
6. Step 6: Final answer
   x = 90,744.86