Finding the Fourth Proportional to 101,021.02, 139,468.74 and 89,812

Step by Step Solution

1. Step 1: Write the proportion equation
   101,021.02 : 139,468.74 = 89,812 : x
2. Step 2: Convert to fraction form
   101,021.02/139,468.74 = 89,812/x
3. Step 3: Cross multiply
   101,021.02x = 139,468.74 × 89,812
4. Step 4: Simplify right side
   101,021.02x = 12,525,966,476.88
5. Step 5: Solve for x
   x = 12,525,966,476.88/101,021.02
6. Step 6: Final answer
   x = 123,993.66