Finding the Fourth Proportional to 42,419.10, 63,612.45 and 12,827.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,419.10 : 63,612.45 = 12,827.10 : x
2. Step 2: Convert to fraction form
   42,419.10/63,612.45 = 12,827.10/x
3. Step 3: Cross multiply
   42,419.10x = 63,612.45 × 12,827.10
4. Step 4: Simplify right side
   42,419.10x = 815,963,257.40
5. Step 5: Solve for x
   x = 815,963,257.40/42,419.10
6. Step 6: Final answer
   x = 19,235.75