Finding the Fourth Proportional to 13,066.56, 19,590.12 and 5,664.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.56 : 19,590.12 = 5,664.78 : x
2. Step 2: Convert to fraction form
   13,066.56/19,590.12 = 5,664.78/x
3. Step 3: Cross multiply
   13,066.56x = 19,590.12 × 5,664.78
4. Step 4: Simplify right side
   13,066.56x = 110,973,719.97
5. Step 5: Solve for x
   x = 110,973,719.97/13,066.56
6. Step 6: Final answer
   x = 8,492.96