Finding the Fourth Proportional to 12,748.80, 19,116.63 and 5,722.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,748.80 : 19,116.63 = 5,722.79 : x
2. Step 2: Convert to fraction form
   12,748.80/19,116.63 = 5,722.79/x
3. Step 3: Cross multiply
   12,748.80x = 19,116.63 × 5,722.79
4. Step 4: Simplify right side
   12,748.80x = 109,400,334.80
5. Step 5: Solve for x
   x = 109,400,334.80/12,748.80
6. Step 6: Final answer
   x = 8,581.23