Finding the Fourth Proportional to 17,821.20, 26,736.42 and 5,340.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,821.20 : 26,736.42 = 5,340.72 : x
2. Step 2: Convert to fraction form
   17,821.20/26,736.42 = 5,340.72/x
3. Step 3: Cross multiply
   17,821.20x = 26,736.42 × 5,340.72
4. Step 4: Simplify right side
   17,821.20x = 142,791,733.02
5. Step 5: Solve for x
   x = 142,791,733.02/17,821.20
6. Step 6: Final answer
   x = 8,012.46