Finding the Fourth Proportional to 8,646.45, 11,931.62 and 5,109.99

Step by Step Solution

1. Step 1: Write the proportion equation
   8,646.45 : 11,931.62 = 5,109.99 : x
2. Step 2: Convert to fraction form
   8,646.45/11,931.62 = 5,109.99/x
3. Step 3: Cross multiply
   8,646.45x = 11,931.62 × 5,109.99
4. Step 4: Simplify right side
   8,646.45x = 60,970,433.33
5. Step 5: Solve for x
   x = 60,970,433.33/8,646.45
6. Step 6: Final answer
   x = 7,051.50