Finding the Fourth Proportional to 111,720.79, 154,165.50 and 65,773.14

Step by Step Solution

1. Step 1: Write the proportion equation
   111,720.79 : 154,165.50 = 65,773.14 : x
2. Step 2: Convert to fraction form
   111,720.79/154,165.50 = 65,773.14/x
3. Step 3: Cross multiply
   111,720.79x = 154,165.50 × 65,773.14
4. Step 4: Simplify right side
   111,720.79x = 10,139,949,014.67
5. Step 5: Solve for x
   x = 10,139,949,014.67/111,720.79
6. Step 6: Final answer
   x = 90,761.52