Finding the Fourth Proportional to 89,679.17, 123,757.61 and 53,869.79

Step by Step Solution

1. Step 1: Write the proportion equation
   89,679.17 : 123,757.61 = 53,869.79 : x
2. Step 2: Convert to fraction form
   89,679.17/123,757.61 = 53,869.79/x
3. Step 3: Cross multiply
   89,679.17x = 123,757.61 × 53,869.79
4. Step 4: Simplify right side
   89,679.17x = 6,666,795,573.46
5. Step 5: Solve for x
   x = 6,666,795,573.46/89,679.17
6. Step 6: Final answer
   x = 74,340.52