Finding the Fourth Proportional to 13,267.17, 19,904.00 and 5,478.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,267.17 : 19,904.00 = 5,478.21 : x
2. Step 2: Convert to fraction form
   13,267.17/19,904.00 = 5,478.21/x
3. Step 3: Cross multiply
   13,267.17x = 19,904.00 × 5,478.21
4. Step 4: Simplify right side
   13,267.17x = 109,038,264.45
5. Step 5: Solve for x
   x = 109,038,264.45/13,267.17
6. Step 6: Final answer
   x = 8,218.65