Finding the Fourth Proportional to 42,017.48, 63,038.58 and 12,436.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,017.48 : 63,038.58 = 12,436.10 : x
2. Step 2: Convert to fraction form
   42,017.48/63,038.58 = 12,436.10/x
3. Step 3: Cross multiply
   42,017.48x = 63,038.58 × 12,436.10
4. Step 4: Simplify right side
   42,017.48x = 783,954,084.74
5. Step 5: Solve for x
   x = 783,954,084.74/42,017.48
6. Step 6: Final answer
   x = 18,657.81