Finding the Fourth Proportional to 89,778.70, 123,802.55 and 59,159.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,778.70 : 123,802.55 = 59,159.78 : x
2. Step 2: Convert to fraction form
   89,778.70/123,802.55 = 59,159.78/x
3. Step 3: Cross multiply
   89,778.70x = 123,802.55 × 59,159.78
4. Step 4: Simplify right side
   89,778.70x = 7,324,131,325.64
5. Step 5: Solve for x
   x = 7,324,131,325.64/89,778.70
6. Step 6: Final answer
   x = 81,579.84