Finding the Fourth Proportional to 8,991.77, 12,409.03 and 5,012.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,991.77 : 12,409.03 = 5,012.88 : x
2. Step 2: Convert to fraction form
   8,991.77/12,409.03 = 5,012.88/x
3. Step 3: Cross multiply
   8,991.77x = 12,409.03 × 5,012.88
4. Step 4: Simplify right side
   8,991.77x = 62,204,978.31
5. Step 5: Solve for x
   x = 62,204,978.31/8,991.77
6. Step 6: Final answer
   x = 6,917.99