Finding the Fourth Proportional to 89,585.78, 123,602.73 and 57,772.94

Step by Step Solution

1. Step 1: Write the proportion equation
   89,585.78 : 123,602.73 = 57,772.94 : x
2. Step 2: Convert to fraction form
   89,585.78/123,602.73 = 57,772.94/x
3. Step 3: Cross multiply
   89,585.78x = 123,602.73 × 57,772.94
4. Step 4: Simplify right side
   89,585.78x = 7,140,893,104.13
5. Step 5: Solve for x
   x = 7,140,893,104.13/89,585.78
6. Step 6: Final answer
   x = 79,710.12