Finding the Fourth Proportional to 89,455.78, 123,455.19 and 59,188.69

Step by Step Solution

1. Step 1: Write the proportion equation
   89,455.78 : 123,455.19 = 59,188.69 : x
2. Step 2: Convert to fraction form
   89,455.78/123,455.19 = 59,188.69/x
3. Step 3: Cross multiply
   89,455.78x = 123,455.19 × 59,188.69
4. Step 4: Simplify right side
   89,455.78x = 7,307,150,969.80
5. Step 5: Solve for x
   x = 7,307,150,969.80/89,455.78
6. Step 6: Final answer
   x = 81,684.50