Finding the Fourth Proportional to 28,253.34, 42,389.16 and 17,020.86

Step by Step Solution

1. Step 1: Write the proportion equation
   28,253.34 : 42,389.16 = 17,020.86 : x
2. Step 2: Convert to fraction form
   28,253.34/42,389.16 = 17,020.86/x
3. Step 3: Cross multiply
   28,253.34x = 42,389.16 × 17,020.86
4. Step 4: Simplify right side
   28,253.34x = 721,499,957.88
5. Step 5: Solve for x
   x = 721,499,957.88/28,253.34
6. Step 6: Final answer
   x = 25,536.80