Finding the Fourth Proportional to 42,069.70, 63,099.69 and 12,484.45

Step by Step Solution

1. Step 1: Write the proportion equation
   42,069.70 : 63,099.69 = 12,484.45 : x
2. Step 2: Convert to fraction form
   42,069.70/63,099.69 = 12,484.45/x
3. Step 3: Cross multiply
   42,069.70x = 63,099.69 × 12,484.45
4. Step 4: Simplify right side
   42,069.70x = 787,764,924.82
5. Step 5: Solve for x
   x = 787,764,924.82/42,069.70
6. Step 6: Final answer
   x = 18,725.23