Finding the Fourth Proportional to 42,007.75, 57,970.70 and 23,145.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.75 : 57,970.70 = 23,145.28 : x
2. Step 2: Convert to fraction form
   42,007.75/57,970.70 = 23,145.28/x
3. Step 3: Cross multiply
   42,007.75x = 57,970.70 × 23,145.28
4. Step 4: Simplify right side
   42,007.75x = 1,341,748,083.30
5. Step 5: Solve for x
   x = 1,341,748,083.30/42,007.75
6. Step 6: Final answer
   x = 31,940.49