Finding the Fourth Proportional to 143,090.14, 197,465.16 and 89,406.30

Step by Step Solution

1. Step 1: Write the proportion equation
   143,090.14 : 197,465.16 = 89,406.30 : x
2. Step 2: Convert to fraction form
   143,090.14/197,465.16 = 89,406.30/x
3. Step 3: Cross multiply
   143,090.14x = 197,465.16 × 89,406.30
4. Step 4: Simplify right side
   143,090.14x = 17,654,629,334.51
5. Step 5: Solve for x
   x = 17,654,629,334.51/143,090.14
6. Step 6: Final answer
   x = 123,381.17