Finding the Fourth Proportional to 89,434.79, 123,346.77 and 55,419.65

Step by Step Solution

1. Step 1: Write the proportion equation
   89,434.79 : 123,346.77 = 55,419.65 : x
2. Step 2: Convert to fraction form
   89,434.79/123,346.77 = 55,419.65/x
3. Step 3: Cross multiply
   89,434.79x = 123,346.77 × 55,419.65
4. Step 4: Simplify right side
   89,434.79x = 6,835,834,822.03
5. Step 5: Solve for x
   x = 6,835,834,822.03/89,434.79
6. Step 6: Final answer
   x = 76,433.73