Finding the Fourth Proportional to 13,111.61, 19,662.58 and 4,789.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.61 : 19,662.58 = 4,789.16 : x
2. Step 2: Convert to fraction form
   13,111.61/19,662.58 = 4,789.16/x
3. Step 3: Cross multiply
   13,111.61x = 19,662.58 × 4,789.16
4. Step 4: Simplify right side
   13,111.61x = 94,167,223.04
5. Step 5: Solve for x
   x = 94,167,223.04/13,111.61
6. Step 6: Final answer
   x = 7,181.98