Finding the Fourth Proportional to 115,978.09, 160,140.23 and 89,077.99

Step by Step Solution

1. Step 1: Write the proportion equation
   115,978.09 : 160,140.23 = 89,077.99 : x
2. Step 2: Convert to fraction form
   115,978.09/160,140.23 = 89,077.99/x
3. Step 3: Cross multiply
   115,978.09x = 160,140.23 × 89,077.99
4. Step 4: Simplify right side
   115,978.09x = 14,264,969,806.54
5. Step 5: Solve for x
   x = 14,264,969,806.54/115,978.09
6. Step 6: Final answer
   x = 122,997.11