Finding the Fourth Proportional to 8,987.54, 12,404.30 and 5,212.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,987.54 : 12,404.30 = 5,212.94 : x
2. Step 2: Convert to fraction form
   8,987.54/12,404.30 = 5,212.94/x
3. Step 3: Cross multiply
   8,987.54x = 12,404.30 × 5,212.94
4. Step 4: Simplify right side
   8,987.54x = 64,662,783.56
5. Step 5: Solve for x
   x = 64,662,783.56/8,987.54
6. Step 6: Final answer
   x = 7,194.72