Finding the Fourth Proportional to 42,020.28, 57,987.60 and 23,157

Step by Step Solution

1. Step 1: Write the proportion equation
   42,020.28 : 57,987.60 = 23,157 : x
2. Step 2: Convert to fraction form
   42,020.28/57,987.60 = 23,157/x
3. Step 3: Cross multiply
   42,020.28x = 57,987.60 × 23,157
4. Step 4: Simplify right side
   42,020.28x = 1,342,818,853.20
5. Step 5: Solve for x
   x = 1,342,818,853.20/42,020.28
6. Step 6: Final answer
   x = 31,956.45