Finding the Fourth Proportional to 89,450.38, 123,431.61 and 53,641.90

Step by Step Solution

1. Step 1: Write the proportion equation
   89,450.38 : 123,431.61 = 53,641.90 : x
2. Step 2: Convert to fraction form
   89,450.38/123,431.61 = 53,641.90/x
3. Step 3: Cross multiply
   89,450.38x = 123,431.61 × 53,641.90
4. Step 4: Simplify right side
   89,450.38x = 6,621,106,080.46
5. Step 5: Solve for x
   x = 6,621,106,080.46/89,450.38
6. Step 6: Final answer
   x = 74,019.88