Finding the Fourth Proportional to 42,462.17, 63,693.48 and 12,880.03

Step by Step Solution

1. Step 1: Write the proportion equation
   42,462.17 : 63,693.48 = 12,880.03 : x
2. Step 2: Convert to fraction form
   42,462.17/63,693.48 = 12,880.03/x
3. Step 3: Cross multiply
   42,462.17x = 63,693.48 × 12,880.03
4. Step 4: Simplify right side
   42,462.17x = 820,373,933.20
5. Step 5: Solve for x
   x = 820,373,933.20/42,462.17
6. Step 6: Final answer
   x = 19,320.11