Finding the Fourth Proportional to 89,590.78, 123,609.63 and 57,777.94

Step by Step Solution

1. Step 1: Write the proportion equation
   89,590.78 : 123,609.63 = 57,777.94 : x
2. Step 2: Convert to fraction form
   89,590.78/123,609.63 = 57,777.94/x
3. Step 3: Cross multiply
   89,590.78x = 123,609.63 × 57,777.94
4. Step 4: Simplify right side
   89,590.78x = 7,141,909,785.56
5. Step 5: Solve for x
   x = 7,141,909,785.56/89,590.78
6. Step 6: Final answer
   x = 79,717.02