Finding the Fourth Proportional to 42,165.48, 63,240.90 and 15,870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,165.48 : 63,240.90 = 15,870.42 : x
2. Step 2: Convert to fraction form
   42,165.48/63,240.90 = 15,870.42/x
3. Step 3: Cross multiply
   42,165.48x = 63,240.90 × 15,870.42
4. Step 4: Simplify right side
   42,165.48x = 1,003,659,644.18
5. Step 5: Solve for x
   x = 1,003,659,644.18/42,165.48
6. Step 6: Final answer
   x = 23,802.87