Finding the Fourth Proportional to 42,541.34, 63,821.24 and 12,958.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,541.34 : 63,821.24 = 12,958.40 : x
2. Step 2: Convert to fraction form
   42,541.34/63,821.24 = 12,958.40/x
3. Step 3: Cross multiply
   42,541.34x = 63,821.24 × 12,958.40
4. Step 4: Simplify right side
   42,541.34x = 827,021,156.42
5. Step 5: Solve for x
   x = 827,021,156.42/42,541.34
6. Step 6: Final answer
   x = 19,440.41