Finding the Fourth Proportional to 10,004.79, 13,808.30 and 5,815.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,004.79 : 13,808.30 = 5,815.47 : x
2. Step 2: Convert to fraction form
   10,004.79/13,808.30 = 5,815.47/x
3. Step 3: Cross multiply
   10,004.79x = 13,808.30 × 5,815.47
4. Step 4: Simplify right side
   10,004.79x = 80,301,725.32
5. Step 5: Solve for x
   x = 80,301,725.32/10,004.79
6. Step 6: Final answer
   x = 8,026.33