Finding the Fourth Proportional to 9,411.06, 12,987.33 and 5,219.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.06 : 12,987.33 = 5,219.34 : x
2. Step 2: Convert to fraction form
   9,411.06/12,987.33 = 5,219.34/x
3. Step 3: Cross multiply
   9,411.06x = 12,987.33 × 5,219.34
4. Step 4: Simplify right side
   9,411.06x = 67,785,290.96
5. Step 5: Solve for x
   x = 67,785,290.96/9,411.06
6. Step 6: Final answer
   x = 7,202.73