Finding the Fourth Proportional to 42,817.12, 64,244.15 and 17,862.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,817.12 : 64,244.15 = 17,862.09 : x
2. Step 2: Convert to fraction form
   42,817.12/64,244.15 = 17,862.09/x
3. Step 3: Cross multiply
   42,817.12x = 64,244.15 × 17,862.09
4. Step 4: Simplify right side
   42,817.12x = 1,147,534,789.27
5. Step 5: Solve for x
   x = 1,147,534,789.27/42,817.12
6. Step 6: Final answer
   x = 26,800.84