Finding the Fourth Proportional to 42,084.36, 63,135.18 and 12,499.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,084.36 : 63,135.18 = 12,499.56 : x
2. Step 2: Convert to fraction form
   42,084.36/63,135.18 = 12,499.56/x
3. Step 3: Cross multiply
   42,084.36x = 63,135.18 × 12,499.56
4. Step 4: Simplify right side
   42,084.36x = 789,161,970.52
5. Step 5: Solve for x
   x = 789,161,970.52/42,084.36
6. Step 6: Final answer
   x = 18,751.91