Finding the Fourth Proportional to 89,389.55, 123,322.31 and 57,576.91

Step by Step Solution

1. Step 1: Write the proportion equation
   89,389.55 : 123,322.31 = 57,576.91 : x
2. Step 2: Convert to fraction form
   89,389.55/123,322.31 = 57,576.91/x
3. Step 3: Cross multiply
   89,389.55x = 123,322.31 × 57,576.91
4. Step 4: Simplify right side
   89,389.55x = 7,100,517,255.98
5. Step 5: Solve for x
   x = 7,100,517,255.98/89,389.55
6. Step 6: Final answer
   x = 79,433.42