Finding the Fourth Proportional to 89,553.56, 123,666.90 and 57,777.08

Step by Step Solution

1. Step 1: Write the proportion equation
   89,553.56 : 123,666.90 = 57,777.08 : x
2. Step 2: Convert to fraction form
   89,553.56/123,666.90 = 57,777.08/x
3. Step 3: Cross multiply
   89,553.56x = 123,666.90 × 57,777.08
4. Step 4: Simplify right side
   89,553.56x = 7,145,112,374.65
5. Step 5: Solve for x
   x = 7,145,112,374.65/89,553.56
6. Step 6: Final answer
   x = 79,785.91