Finding the Fourth Proportional to 42,915.03, 64,390.32 and 23,170.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,915.03 : 64,390.32 = 23,170.38 : x
2. Step 2: Convert to fraction form
   42,915.03/64,390.32 = 23,170.38/x
3. Step 3: Cross multiply
   42,915.03x = 64,390.32 × 23,170.38
4. Step 4: Simplify right side
   42,915.03x = 1,491,948,182.72
5. Step 5: Solve for x
   x = 1,491,948,182.72/42,915.03
6. Step 6: Final answer
   x = 34,765.17