Finding the Fourth Proportional to 89,269.12, 123,218.76 and 57,438

Step by Step Solution

1. Step 1: Write the proportion equation
   89,269.12 : 123,218.76 = 57,438 : x
2. Step 2: Convert to fraction form
   89,269.12/123,218.76 = 57,438/x
3. Step 3: Cross multiply
   89,269.12x = 123,218.76 × 57,438
4. Step 4: Simplify right side
   89,269.12x = 7,077,439,136.88
5. Step 5: Solve for x
   x = 7,077,439,136.88/89,269.12
6. Step 6: Final answer
   x = 79,282.05