Finding the Fourth Proportional to 101,017.99, 139,464.63 and 89,809.03

Step by Step Solution

1. Step 1: Write the proportion equation
   101,017.99 : 139,464.63 = 89,809.03 : x
2. Step 2: Convert to fraction form
   101,017.99/139,464.63 = 89,809.03/x
3. Step 3: Cross multiply
   101,017.99x = 139,464.63 × 89,809.03
4. Step 4: Simplify right side
   101,017.99x = 12,525,183,139.61
5. Step 5: Solve for x
   x = 12,525,183,139.61/101,017.99
6. Step 6: Final answer
   x = 123,989.63