Finding the Fourth Proportional to 89,068.78, 122,855.78 and 57,277.90

Step by Step Solution

1. Step 1: Write the proportion equation
   89,068.78 : 122,855.78 = 57,277.90 : x
2. Step 2: Convert to fraction form
   89,068.78/122,855.78 = 57,277.90/x
3. Step 3: Cross multiply
   89,068.78x = 122,855.78 × 57,277.90
4. Step 4: Simplify right side
   89,068.78x = 7,036,921,081.26
5. Step 5: Solve for x
   x = 7,036,921,081.26/89,068.78
6. Step 6: Final answer
   x = 79,005.47