Finding the Fourth Proportional to 42,462.10, 63,693.24 and 12,880.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,462.10 : 63,693.24 = 12,880.18 : x
2. Step 2: Convert to fraction form
   42,462.10/63,693.24 = 12,880.18/x
3. Step 3: Cross multiply
   42,462.10x = 63,693.24 × 12,880.18
4. Step 4: Simplify right side
   42,462.10x = 820,380,395.98
5. Step 5: Solve for x
   x = 820,380,395.98/42,462.10
6. Step 6: Final answer
   x = 19,320.30