Finding the Fourth Proportional to 13,084.91, 19,621.89 and 5,288.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,084.91 : 19,621.89 = 5,288.25 : x
2. Step 2: Convert to fraction form
   13,084.91/19,621.89 = 5,288.25/x
3. Step 3: Cross multiply
   13,084.91x = 19,621.89 × 5,288.25
4. Step 4: Simplify right side
   13,084.91x = 103,765,459.79
5. Step 5: Solve for x
   x = 103,765,459.79/13,084.91
6. Step 6: Final answer
   x = 7,930.16