Finding the Fourth Proportional to 89,442, 123,378.60 and 55,849.68

Step by Step Solution

1. Step 1: Write the proportion equation
   89,442 : 123,378.60 = 55,849.68 : x
2. Step 2: Convert to fraction form
   89,442/123,378.60 = 55,849.68/x
3. Step 3: Cross multiply
   89,442x = 123,378.60 × 55,849.68
4. Step 4: Simplify right side
   89,442x = 6,890,655,328.85
5. Step 5: Solve for x
   x = 6,890,655,328.85/89,442
6. Step 6: Final answer
   x = 77,040.49