Finding the Fourth Proportional to 42,456.78, 63,688.41 and 11,291.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,456.78 : 63,688.41 = 11,291.22 : x
2. Step 2: Convert to fraction form
   42,456.78/63,688.41 = 11,291.22/x
3. Step 3: Cross multiply
   42,456.78x = 63,688.41 × 11,291.22
4. Step 4: Simplify right side
   42,456.78x = 719,119,848.76
5. Step 5: Solve for x
   x = 719,119,848.76/42,456.78
6. Step 6: Final answer
   x = 16,937.69