Finding the Fourth Proportional to 42,093.45, 63,139.64 and 12,108.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,093.45 : 63,139.64 = 12,108.42 : x
2. Step 2: Convert to fraction form
   42,093.45/63,139.64 = 12,108.42/x
3. Step 3: Cross multiply
   42,093.45x = 63,139.64 × 12,108.42
4. Step 4: Simplify right side
   42,093.45x = 764,521,219.23
5. Step 5: Solve for x
   x = 764,521,219.23/42,093.45
6. Step 6: Final answer
   x = 18,162.47