Finding the Fourth Proportional to 143,485, 197,926.87 and 89,676.59

Step by Step Solution

1. Step 1: Write the proportion equation
   143,485 : 197,926.87 = 89,676.59 : x
2. Step 2: Convert to fraction form
   143,485/197,926.87 = 89,676.59/x
3. Step 3: Cross multiply
   143,485x = 197,926.87 × 89,676.59
4. Step 4: Simplify right side
   143,485x = 17,749,406,770.97
5. Step 5: Solve for x
   x = 17,749,406,770.97/143,485
6. Step 6: Final answer
   x = 123,702.18