Finding the Fourth Proportional to 42,318.72, 63,484.56 and 12,732.66

Step by Step Solution

1. Step 1: Write the proportion equation
   42,318.72 : 63,484.56 = 12,732.66 : x
2. Step 2: Convert to fraction form
   42,318.72/63,484.56 = 12,732.66/x
3. Step 3: Cross multiply
   42,318.72x = 63,484.56 × 12,732.66
4. Step 4: Simplify right side
   42,318.72x = 808,327,317.73
5. Step 5: Solve for x
   x = 808,327,317.73/42,318.72
6. Step 6: Final answer
   x = 19,100.94