Finding the Fourth Proportional to 42,817.29, 64,181.79 and 17,871.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,817.29 : 64,181.79 = 17,871.86 : x
2. Step 2: Convert to fraction form
   42,817.29/64,181.79 = 17,871.86/x
3. Step 3: Cross multiply
   42,817.29x = 64,181.79 × 17,871.86
4. Step 4: Simplify right side
   42,817.29x = 1,147,047,644.52
5. Step 5: Solve for x
   x = 1,147,047,644.52/42,817.29
6. Step 6: Final answer
   x = 26,789.36