Finding the Fourth Proportional to 89,306.78, 123,178.38 and 59,117.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89,306.78 : 123,178.38 = 59,117.96 : x
2. Step 2: Convert to fraction form
   89,306.78/123,178.38 = 59,117.96/x
3. Step 3: Cross multiply
   89,306.78x = 123,178.38 × 59,117.96
4. Step 4: Simplify right side
   89,306.78x = 7,282,054,541.70
5. Step 5: Solve for x
   x = 7,282,054,541.70/89,306.78
6. Step 6: Final answer
   x = 81,539.77