Finding the Fourth Proportional to 42,915.83, 64,383.02 and 17,615.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,915.83 : 64,383.02 = 17,615.40 : x
2. Step 2: Convert to fraction form
   42,915.83/64,383.02 = 17,615.40/x
3. Step 3: Cross multiply
   42,915.83x = 64,383.02 × 17,615.40
4. Step 4: Simplify right side
   42,915.83x = 1,134,132,562.43
5. Step 5: Solve for x
   x = 1,134,132,562.43/42,915.83
6. Step 6: Final answer
   x = 26,426.91