Finding the Fourth Proportional to 10,621.86, 14,659.74 and 7,647.54

Step by Step Solution

1. Step 1: Write the proportion equation
   10,621.86 : 14,659.74 = 7,647.54 : x
2. Step 2: Convert to fraction form
   10,621.86/14,659.74 = 7,647.54/x
3. Step 3: Cross multiply
   10,621.86x = 14,659.74 × 7,647.54
4. Step 4: Simplify right side
   10,621.86x = 112,110,948.04
5. Step 5: Solve for x
   x = 112,110,948.04/10,621.86
6. Step 6: Final answer
   x = 10,554.74