Finding the Fourth Proportional to 8,991.80, 12,407.82 and 5,012.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,991.80 : 12,407.82 = 5,012.82 : x
2. Step 2: Convert to fraction form
   8,991.80/12,407.82 = 5,012.82/x
3. Step 3: Cross multiply
   8,991.80x = 12,407.82 × 5,012.82
4. Step 4: Simplify right side
   8,991.80x = 62,198,168.25
5. Step 5: Solve for x
   x = 62,198,168.25/8,991.80
6. Step 6: Final answer
   x = 6,917.21