Finding the Fourth Proportional to 42,096.70, 63,144.51 and 12,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,096.70 : 63,144.51 = 12,111.72 : x
2. Step 2: Convert to fraction form
   42,096.70/63,144.51 = 12,111.72/x
3. Step 3: Cross multiply
   42,096.70x = 63,144.51 × 12,111.72
4. Step 4: Simplify right side
   42,096.70x = 764,788,624.66
5. Step 5: Solve for x
   x = 764,788,624.66/42,096.70
6. Step 6: Final answer
   x = 18,167.42