Finding the Fourth Proportional to 8,407.19, 12,621.72 and 5,498.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,407.19 : 12,621.72 = 5,498.48 : x
2. Step 2: Convert to fraction form
   8,407.19/12,621.72 = 5,498.48/x
3. Step 3: Cross multiply
   8,407.19x = 12,621.72 × 5,498.48
4. Step 4: Simplify right side
   8,407.19x = 69,400,327.16
5. Step 5: Solve for x
   x = 69,400,327.16/8,407.19
6. Step 6: Final answer
   x = 8,254.88