Finding the Fourth Proportional to 42,097.70, 63,146 and 12,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,097.70 : 63,146 = 12,112.72 : x
2. Step 2: Convert to fraction form
   42,097.70/63,146 = 12,112.72/x
3. Step 3: Cross multiply
   42,097.70x = 63,146 × 12,112.72
4. Step 4: Simplify right side
   42,097.70x = 764,869,817.12
5. Step 5: Solve for x
   x = 764,869,817.12/42,097.70
6. Step 6: Final answer
   x = 18,168.92