Finding the Fourth Proportional to 16,670.89, 23,004.98 and 9,115.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,670.89 : 23,004.98 = 9,115.76 : x
2. Step 2: Convert to fraction form
   16,670.89/23,004.98 = 9,115.76/x
3. Step 3: Cross multiply
   16,670.89x = 23,004.98 × 9,115.76
4. Step 4: Simplify right side
   16,670.89x = 209,707,738.67
5. Step 5: Solve for x
   x = 209,707,738.67/16,670.89
6. Step 6: Final answer
   x = 12,579.28