Finding the Fourth Proportional to 89,580.39, 123,648.62 and 57,749.19

Step by Step Solution

1. Step 1: Write the proportion equation
   89,580.39 : 123,648.62 = 57,749.19 : x
2. Step 2: Convert to fraction form
   89,580.39/123,648.62 = 57,749.19/x
3. Step 3: Cross multiply
   89,580.39x = 123,648.62 × 57,749.19
4. Step 4: Simplify right side
   89,580.39x = 7,140,607,360.87
5. Step 5: Solve for x
   x = 7,140,607,360.87/89,580.39
6. Step 6: Final answer
   x = 79,711.72