Finding the Fourth Proportional to 42,022.35, 63,046.74 and 12,440.45

Step by Step Solution

1. Step 1: Write the proportion equation
   42,022.35 : 63,046.74 = 12,440.45 : x
2. Step 2: Convert to fraction form
   42,022.35/63,046.74 = 12,440.45/x
3. Step 3: Cross multiply
   42,022.35x = 63,046.74 × 12,440.45
4. Step 4: Simplify right side
   42,022.35x = 784,329,501.40
5. Step 5: Solve for x
   x = 784,329,501.40/42,022.35
6. Step 6: Final answer
   x = 18,664.58