Finding the Fourth Proportional to 8,784.72, 12,121.56 and 5,058

Step by Step Solution

1. Step 1: Write the proportion equation
   8,784.72 : 12,121.56 = 5,058 : x
2. Step 2: Convert to fraction form
   8,784.72/12,121.56 = 5,058/x
3. Step 3: Cross multiply
   8,784.72x = 12,121.56 × 5,058
4. Step 4: Simplify right side
   8,784.72x = 61,310,850.48
5. Step 5: Solve for x
   x = 61,310,850.48/8,784.72
6. Step 6: Final answer
   x = 6,979.26