Finding the Fourth Proportional to 28,820.43, 43,257.60 and 17,748.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,820.43 : 43,257.60 = 17,748.72 : x
2. Step 2: Convert to fraction form
   28,820.43/43,257.60 = 17,748.72/x
3. Step 3: Cross multiply
   28,820.43x = 43,257.60 × 17,748.72
4. Step 4: Simplify right side
   28,820.43x = 767,767,030.27
5. Step 5: Solve for x
   x = 767,767,030.27/28,820.43
6. Step 6: Final answer
   x = 26,639.68