Finding the Fourth Proportional to 89,507.57, 123,511.99 and 53,206.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89,507.57 : 123,511.99 = 53,206.10 : x
2. Step 2: Convert to fraction form
   89,507.57/123,511.99 = 53,206.10/x
3. Step 3: Cross multiply
   89,507.57x = 123,511.99 × 53,206.10
4. Step 4: Simplify right side
   89,507.57x = 6,571,591,103.50
5. Step 5: Solve for x
   x = 6,571,591,103.50/89,507.57
6. Step 6: Final answer
   x = 73,419.39