Finding the Fourth Proportional to 8,998.42, 12,417.28 and 5,221.29

Step by Step Solution

1. Step 1: Write the proportion equation
   8,998.42 : 12,417.28 = 5,221.29 : x
2. Step 2: Convert to fraction form
   8,998.42/12,417.28 = 5,221.29/x
3. Step 3: Cross multiply
   8,998.42x = 12,417.28 × 5,221.29
4. Step 4: Simplify right side
   8,998.42x = 64,834,219.89
5. Step 5: Solve for x
   x = 64,834,219.89/8,998.42
6. Step 6: Final answer
   x = 7,205.07