Finding the Fourth Proportional to 89,462.56, 123,485.84 and 57,631.36

Step by Step Solution

1. Step 1: Write the proportion equation
   89,462.56 : 123,485.84 = 57,631.36 : x
2. Step 2: Convert to fraction form
   89,462.56/123,485.84 = 57,631.36/x
3. Step 3: Cross multiply
   89,462.56x = 123,485.84 × 57,631.36
4. Step 4: Simplify right side
   89,462.56x = 7,116,656,899.94
5. Step 5: Solve for x
   x = 7,116,656,899.94/89,462.56
6. Step 6: Final answer
   x = 79,549.00