Finding the Fourth Proportional to 42,142.16, 63,245.88 and 15,870.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,142.16 : 63,245.88 = 15,870.80 : x
2. Step 2: Convert to fraction form
   42,142.16/63,245.88 = 15,870.80/x
3. Step 3: Cross multiply
   42,142.16x = 63,245.88 × 15,870.80
4. Step 4: Simplify right side
   42,142.16x = 1,003,762,712.30
5. Step 5: Solve for x
   x = 1,003,762,712.30/42,142.16
6. Step 6: Final answer
   x = 23,818.49